Matrix Multiplication in C - Exercise 10 Solution: C Tutorial In Hindi #61

[@CodeWithHarry]

I have created a second (English) channel and uploaded a brand new 2019 Python 3.7 Tutorial. Do Check out: kzbin.info/door/7btqG2Ww0_2LwuQxpvo2HQ

[@usersanjeevkumar]

Rock Paper Scissors ka Source code aapne nhi diya hai...

[@tanishchaudhary4496]

Determinant using recursion in c as soon as possible

[@SK-oo7vx]

#include void display(int a[100][100],int b[100][100],int m,int n); void accept (int a[100][100],int m,int n); void add(int a[100][100], int b[100][100], int m, int n); void multiply(int a[100][100], int b[100][100],int m, int n); int main() { int a[100][100], b[100][100], m, n; printf(" How many rows and columns for both matrices? "); scanf("%d%d", &m, &n); printf(" Enter the matrix elements for first matrix : :"); accept(a, m, n); printf(" Enter the matrix elements for second matrix : "); accept(b, m, n); printf(" The matrix is : "); display(a,b,m,n); add(a, b, m, n); multiply(a, b, m, n); } void accept(int a[100][100], int m, int n) { int i, j; for(i = 0; i < m; i++) // outer loop fo rows // { for(j = 0;j < n; j++) // inner loop fo columns // { scanf("%d", &a[i][j]); } } } void display(int a[100][100],int b[100][100],int m ,int n) { int i, j; printf(" The elements of first matrix is %d by %d matrix are ",m,n); for(i = 0; i < m; i++) // outer loop fo rows // { for(j = 0;j < n; j++) // inner loop fo columns // { printf("%d\t", a[i][j]); } printf(" "); } printf(" The elements of second matrix is %d by %d matrix are ",m,n); for(i = 0; i < n; i++) // outer loop fo rows // { for(j= 0;j < m; j++) // inner loop fo columns // { printf("%d\t", b[i][j]); } printf(" "); } } void add(int a[100][100], int b[100][100], int m, int n) { int i, j; int add[100][100]; for(i = 0; i < m; i++) { for(j = 0; j < n; j++) { add[i][j] = a[i][j] + b[i][j]; } } printf(" Addition Matrix is "); for(i = 0; i < m; i++) { printf(" "); for(j = 0; j < n; j++) { printf("%d\t",add[i][j]); } } } void multiply(int a[100][100], int b[100][100],int m, int n) { int i, j, k,sum; int multiply[100][100]; for(i = 0; i < m; i++) { for(j = 0; j < n; j++) { multiply[i][j] = 0; for(k = 0; k < n; k++) { sum += a[i][k] * b[k][j]; } multiply[i][j]=sum; sum=0; } printf(" Multiplication Matrix is "); for(i = 0; i < m; i++) { printf (" "); for(j = 0; j < n; j++) { printf("%d\t",multiply[i][j]); } } } }

[@SK-oo7vx]

Sir this code is run properly but multiplication giving wrong in the output sir please can you correct this code

[@Vickykumar-wn6nv]

❤❤

[@animeshsharma7332]

I'm impressed by your consistency in uploading video, keep working it really helps.

[@sayinsarkar8997]

jazaALLAH Harry bhaiii..(May Allah give u best reward)

[@Ashish...114]

Very very thanks 👍🙏🙏🙏🙏

[@bhagawangangane9287]

op bhai main programming ke sath sath maths bhi sikh gaya thank you so much

[@nareshgoyal1994]

bro i have done this exercise using dynamic memory allocation in which a user types his own matrix of any rows and any column and it will multiply those matirx if mltipication is possible otherwise it will tell that multipication is not possible......................thanx for teaching me coding

[@ViralXtreme]

Comment your code

[@sallu_-bhai]

Same me too

[@SwarnadipDutta]

@@ViralXtreme Here's is mine , almost works the same(note: some upgrades can be made such as freeing memory location for matrices should have been put under one function so that almost 30-40 lines can be cut off :) ) #include #include void take_matrix(int **a, int rows, int columns) { for (register int i = 0; i < rows; i++) { for (register int j = 0; j < columns; j++) { printf("Element no.(%d,%d) = ", i + 1, j + 1); scanf("%d", (*(a + i) + j)); } } } void print_matrix(int **a, int rows, int columns) { for (int i = 0; i < rows; i++) { for (int j = 0; j < columns; j++) { printf("Element no.(%d,%d) = %d ", i+1, j+1, *(*(a + i) + j)); } } } int main() { int a_rows, a_columns; printf("Enter the number of rows for matrix A : "); scanf("%d", &a_rows); int **a = (int **)malloc((a_rows) * sizeof(int *)); printf("Enter the number of columns for matrix A : "); scanf("%d", &a_columns); for (int i = 0; i < a_columns; i++) { *(a + i) = (int *)malloc((a_columns) * sizeof(int)); } printf(" "); int b_rows, b_columns; printf("Enter the number of rows for matrix B : "); scanf("%d", &b_rows); int **b = (int **)malloc((b_rows) * sizeof(int)); printf("Enter the number of columns for matrix B : "); scanf("%d", &b_columns); for (int i = 0; i < b_columns; i++) { *(b + i) = (int *)malloc((b_columns) * sizeof(int)); } if (((a != NULL && b != NULL) && (a_columns == b_rows))) { for (int i = 0; i < a_columns; i++) { if (*(a + i) == NULL) { printf("Not enough memory! "); for (int i = 0; i < a_columns; i++) { free(*(a + i)); } return 1; } } for (int i = 0; i < a_columns; i++) { if (*(b + i) == NULL) { printf("Not enough memory! "); for (int i = 0; i < b_columns; i++) { free(*(b + i)); } return 1; } } printf(" "); printf("Enter matrix A elements : "); take_matrix(a, a_rows, a_columns); printf(" "); printf("Enter matrix B elements : "); take_matrix(b, b_rows, b_columns); int **result = (int **)malloc(a_rows * sizeof(int *)); for (int i = 0; i < b_columns; i++) { *(result + i) = (int *)calloc((b_columns), sizeof(int)); } if (result == NULL) { for (int i = 0; i < b_columns; i++) { free(*(result + i)); } free(result); return 1; } printf(" "); for (int i = 0; i < a_rows; i++) { for (int j = 0; j < b_columns; j++) { for (int m = 0; m < a_rows; m++) { result[i][j] += a[i][m] * b[m][j]; } } } printf("The multiplied matrix C = A*B is : "); print_matrix(result, a_rows, b_columns); for (int i = 0; i < b_columns; i++) { free(*(result + i)); } free(result); } if (a_columns != b_rows) { printf("No. of columns of matrix A and rows of matrix B must be the same. "); } for (int i = 0; i < a_columns; i++) { free(*(a + i)); } free(a); for (int i = 0; i < b_columns; i++) { free(*(b + i)); } free(b); return 0; }

[@aakash9025]

Awesome one bro 👊

[@manasmathur173]

Great video very helpful , Thank You

[@hito8391]

You are a good explainer. Please make a node js tutorial

[@2goldenchasma559]

Love 💖💖 your teaching skills bro 👍👍

[@Qubit313]

Thankyou so much love from Pakistan! 🥰

[@mandeepsinghbawa5272]

Bhai please make videos on java script. BTW love you bhai

[@royfamily9273]

Thanks Harry Bhaiya

[@aayushdhankecha1056]

15:50 Matrix form me matrix kese enter ki thi ..... run hone ke bad ..... konsi keys ka use kiya tha ..... please anyone answer .......

[@vanshshrivastava2325]

bhai wo space ka use kiya, Harry bhai ne statement hatadi thi issi liye "enter the element " jaisa nahi aya aur input ek saath diya sabka "space ka use karke". 'Enter' aur 'space' dono work karte hai input ke time pe

[@aayushdhankecha1056]

@@vanshshrivastava2325 it is working .... Thank you so much bro ... 👍

[@abhishekrawat8074]

But in the question, it was asked that we have to take input of number of rows and columns from the user. That was the main problem which I was facing, but I think concept of double pointers could be used here.

[@umbkarai]

#include int main() { int k, l, m, n; int a[100][100], b[100][100], c[100][100]; printf("Enter the value of k "); scanf("%d", &k); printf("Enter the value of l "); scanf("%d", &l); printf("Enter the value of m "); scanf("%d", &m); printf("Enter the value of n "); scanf("%d", &n); printf("Enter the elements of matrix a : "); for (int i = 0; i < k; i++) { for (int j = 0; j < l; j++) { scanf("%d", &a[i][j]); } } printf("Enter the elements of matrix b : "); for (int i = 0; i < m; i++) { for (int j = 0; j < n; j++) { scanf("%d", &b[i][j]); } } printf("Matrix a is : "); for (int i = 0; i < k; i++) { for (int j = 0; j < l; j++) { printf("%d\t", a[i][j]); } printf(" "); } printf("Matrix b is : "); for (int i = 0; i < m; i++) { for (int j = 0; j < n; j++) { printf("%d\t", b[i][j]); } printf(" "); } if (l != m) { printf("Matrix Multiplication is not possible "); } else { for (int i = 0; i < k; i++) { for (int j = 0; j < n; j++) { for (int d = 0; d < l; d++) { c[i][j] += ((a[i][d]) * (b[d][j])); } } } printf("The final matrix adter multiplication of a and b is : "); for (int i = 0; i < k; i++) { for (int j = 0; j < n; j++) { printf("%d\t", c[i][j]); } printf(" "); } } return 0; }

[@bhuvandahal421]

#include int main() { int r1, c1, r2, c2, t; printf("Enter the no. of rows of matrix A: "); scanf("%d", &r1); printf("Enter the no. of columns of matrix A: "); scanf("%d", &c1); printf("Enter the no. of rows of matrix B: "); scanf("%d", &r2); printf("Enter the no. of columns of matrix B: "); scanf("%d", &c2); if(c1 == r2) { int A[r1][c1], B[r2][c2], C[r1][c2]; for(int i = 0; i < r1; i++) { for(int j = 0; j < c1; j++) { printf("Enter the value at (%d, %d) of matrix A: ", i, j); scanf("%d", &A[i][j]); } } for(int i = 0; i < r2; i++) { for(int j = 0; j < c2; j++) { printf("Enter the value at (%d, %d) of matrix B: ", i, j); scanf("%d", &B[i][j]); } } for(int i = 0; i < r1; i++) { for(int j = 0; j < c2; j++) { C[i][j] = 0; } } for(int i = 0; i < r1; i++) { for(int j = 0; j < c2; j++) { for(int k = 0; k < c1; k++) { t = A[i][k] * B[k][j]; C[i][j] += t; } } } printf("The matrix multiplication of A and B is given below: "); printf(" A * B = |"); for(int i = 0; i < r1; i++) { for(int j = 0; j < c2; j++) { printf(" %d ", C[i][j]); } printf("|"); if((i + 1) < r1) { printf(" |"); } } } else { printf("The matrix multiplication of A and B cannot be performed. "); } return 0; }

[@SwarnadipDutta]

I used dynamic memory allocation for the used matrices , otherwise the code can be wayyy shorter (dynamic memory allocation requires error handling a LOT) , also freeing matrices codes are repetitive so that can be put under a single void returning function(same as take_matrix() and print_matrix) #include #include void take_matrix(int **a, int rows, int columns) { for (register int i = 0; i < rows; i++) { for (register int j = 0; j < columns; j++) { printf("Element no.(%d,%d) = ", i + 1, j + 1); scanf("%d", (*(a + i) + j)); } } } void print_matrix(int **a, int rows, int columns) { for (int i = 0; i < rows; i++) { for (int j = 0; j < columns; j++) { printf("Element no.(%d,%d) = %d ", i+1, j+1, *(*(a + i) + j)); } } } int main() { int a_rows, a_columns; printf("Enter the number of rows for matrix A : "); scanf("%d", &a_rows); int **a = (int **)malloc((a_rows) * sizeof(int *)); printf("Enter the number of columns for matrix A : "); scanf("%d", &a_columns); for (int i = 0; i < a_columns; i++) { *(a + i) = (int *)malloc((a_columns) * sizeof(int)); } printf(" "); int b_rows, b_columns; printf("Enter the number of rows for matrix B : "); scanf("%d", &b_rows); int **b = (int **)malloc((b_rows) * sizeof(int)); printf("Enter the number of columns for matrix B : "); scanf("%d", &b_columns); for (int i = 0; i < b_columns; i++) { *(b + i) = (int *)malloc((b_columns) * sizeof(int)); } if (((a != NULL && b != NULL) && (a_columns == b_rows))) { for (int i = 0; i < a_columns; i++) { if (*(a + i) == NULL) { printf("Not enough memory! "); for (int i = 0; i < a_columns; i++) { free(*(a + i)); } return 1; } } for (int i = 0; i < a_columns; i++) { if (*(b + i) == NULL) { printf("Not enough memory! "); for (int i = 0; i < b_columns; i++) { free(*(b + i)); } return 1; } } printf(" "); printf("Enter matrix A elements : "); take_matrix(a, a_rows, a_columns); printf(" "); printf("Enter matrix B elements : "); take_matrix(b, b_rows, b_columns); int **result = (int **)malloc(a_rows * sizeof(int *)); for (int i = 0; i < b_columns; i++) { *(result + i) = (int *)calloc((b_columns), sizeof(int)); } if (result == NULL) { for (int i = 0; i < b_columns; i++) { free(*(result + i)); } free(result); return 1; } printf(" "); for (int i = 0; i < a_rows; i++) { for (int j = 0; j < b_columns; j++) { for (int m = 0; m < a_rows; m++) { result[i][j] += a[i][m] * b[m][j]; } } } printf("The multiplied matrix C = A*B is : "); print_matrix(result, a_rows, b_columns); for (int i = 0; i < b_columns; i++) { free(*(result + i)); } free(result); } if (a_columns != b_rows) { printf("No. of columns of matrix A and rows of matrix B must be the same. "); } for (int i = 0; i < a_columns; i++) { free(*(a + i)); } free(a); for (int i = 0; i < b_columns; i++) { free(*(b + i)); } free(b); return 0; }

[@ajaybabupatel1665]

GOOD PROGRAM

[@BlackGokuX0]

16:44

[@gamingangsuk4940]

I really excited for the next challenge 😁😁😁😁😉

[@sumanmajumdar7884]

13:51

[@engineerbhai7642]

Excellent

[@officialgamer7433]

It's done: #include int main() { int m,n,p,q; printf("Enter the Value for row and column for first matrix: "); scanf("%d%d",&m,&n); printf("Enter the Value for row and column for second matrix: "); scanf("%d%d",&p,&q); if(n==p) { int A[m][n],B[p][q],i,j,k; printf("Enter elements for matrix A: "); for(i=0; i

[@bvscode825]

Your vdos are awesome bro but i have a q on pointers why we should use pointer in real programming and how's it help us. plz if that possible. make a vdo on all pointers explain that. Tnx🙂🙂

[@debodhkumar2905]

because if you are writing your code in functions without the use of pointers then only one value can be returned .. but when you have to return more than one value then with the help of pointers multiple values can be returned ... for example if you have to swap two numbers then you have to use pointers in functions .. as you are returning two values which is (for eg. a and b ) .. i hope you got your answer

[@bvscode825]

@@debodhkumar2905 ya bro tnx👍

[@SwarnadipDutta]

most popular use is to access the value of a local operator out of its scope

[@hdchannel7430]

thankyou sir

[@x-sss-x]

nice boss

[@chemistrylover9670]

What is the use of int m,n

[@nehasinha6697]

wo last me input ka tarika change kaise kiya aapne straight line me teeno numbers ko input kaise kiya aapne ? Mai kar raha to 1 ke niche 2 uske niche 3 jaa raha. I really want to know 🤩

[@princemaurya9717]

Same...pata chala ho to bta de yrr

[@rivines]

i was trying it dynamoically in which we ask for the no. of rows and coloumns and then multiply both of them

[@mohitverma5600]

Did it worked?? Whould u like to show me the resultant code 😁😁??

[@corporateinfo_]

here is the solution for multiplication of any two matrices (if possible). #include #include int main() { int a1,a2, b1,b2, sum = 0; printf("enter the order of the first matrix : i = "); scanf("%d", &a1); getchar(); printf("j = "); scanf("%d", &a2); getchar(); printf("enter the order of the second matrix : i = "); scanf("%d", &b1); getchar(); printf("j = "); scanf("%d", &b2); getchar(); int a[a1][a2]; int b[b1][b2]; int result [a1][b2]; if (a2 == b1) { printf("Enter the first matrix "); for (int i = 0; i < a1; i++) { for (int j = 0; j < a2; j++) { scanf("%d", &a[i][j]); } printf(" "); } printf("Enter the second matrix "); for (int i = 0; i < b1; i++) { for (int j = 0; j < b2; j++) { scanf("%d", &b[i][j]); } printf(" "); } printf("THE PRODUCT OF TWO MATRICES IS : "); for (int i = 0; i < a1; i++) { for (int j = 0; j < b2; j++) { for (int k = 0; k < a2; k++) { sum += a[i][k] * b[k][j]; } result[i][j] = sum; sum = 0; } } for (int i = 0; i < a1; i++) { for (int j = 0; j < b2; j++) { printf("%d \t", result[i][j]); } printf(" "); } } else { printf("THE TWO MATRICES CANNOT BE MULTIPLIED "); return 0; } return 0; }

[@32solankikishan52]

👍👍

[@KashyapVinamra]

Copy paste kar diye 😂

[@gauravrawat8801]

Sir m aur n variable kisliye bane the??

[@NitinKumar-qk1fi]

Complete👌💯👌💯👌💯👌💯👌💯👌💯👌💯

[@devprakash6608]

what is the meaning of this error? error: expected declaration specifiers or '...' before string constant

[@sonitiwari2550]

Bhai stick fighting game banao plz flash use karke your new subscriber from kanpur

[@SoaibAslamOfficial]

Sheikh Soaib

[@praffulmalkoti4407]

Harry I have some doubts 1. Why don't you declare i and j.

[@CodeWithHarry]

I have declared i and j while writing the for loop for (int i = 0; i < 3; i++)

[@roshtukuthiala3965]

I am new to this course I watch all your videos and do all the exercises given by you But this program is taking too long to run it is not giving me output Also it does not show any error As when I run the same program on the other compiler it functions quickly

[@tanishchaudhary4496]

How to find determinant using recursion please 🙏🙏

[@tusharsharma4234]

isse video ke end me aapne complicated kar diya

[@falakm218]

D=A+(B*C) matrix 3*3 kaise banega Harry Bhai....... previous year question m aaya tha mujhse solve ni ho rha h

[@shabbirhabib9447]

you should've solved this excersice using dynamic memory allocation and would have taught us about double pointers

[@moveonvillain1080]

There are multiple ways for creating a 2D matrix using dynamic memory allocation not just double pointers method. The one I personally like is an array of pointers pointing to mem location in heap. Size of the array is the number of rows you want and size of the arrays that those pointers are pointing to in heap is the number of columns you want.

[@svikash6464]

can you please send the code please............

[@manojgurung4418]

harry bro apne paper scissors stone wala game achhe se solve nehi kiya aur ab is matrx wali problem ko bhi acche se solve nehi kiya

[@ChetnThakre]

❤

[@Madanmohan-g5t]

Why we do scanf later

[@himanshukushwaha5064]

harry bhai aapne ye nhi btaya tha size fix rahega I trying to make this program for any size it takes a lot of time

[@PTLEGEND]

My input is not coming like last Plz suggest I had made same cod ebut why different in the terminal

[@DeepakThakurEntrepreneur]

Sorry To Say Brother But Aapk K Diye Gaye Source Code + Video Me Jo Bataye Hai Usss Tarha se First & Second Martix ..... Matrix Form Me Input nahi Hoti Hai Wo Bas Simple Form Me Input Hoti Hai .......

[@amansatvilkar2093]

hoe to take input in that form, did you ge any logic?

[@WildexZone]

Sir i have doubt in K variable . Why We have Take it?

[@moveonvillain1080]

see the explanation from 2:42 to 4:10

[@achyutsavaliya2747]

Moj kar dee

[@manishkumaryadav2442]

sir isme enter key buffer me kyo nahi ruka?? or isme humne getchar(); ka use kyo nahi kia?

[@shubhamarya5005]

Sir how to add a wishlist in your django e-commerce applications

[@InsideSalesforce]

Can anyone tell me " why we use += operator in this exercise"

[@bhaveshjhawar9532]

"s += 4+1" suppose yeh kahi dia hua h ..simply it means s ko barabar krdo 5+s ke .... suppose hamara s pehle tha 1 toh now it is 6..... suppose s = 0 tha now it is 5.... got it ?

[@rahulroy9731]

​@@bhaveshjhawar9532thanks bro

[@pranavairsang9180]

#include void main() { int n1,m1,n2,m2,k,l=0; printf("Enter the number of rows and coloumns in the matrix 1 "); printf("Rows: "); scanf("%d",&n1); printf("Coloumns: "); scanf("%d",&m1); printf("Enter the number of rows and coloumns in the matrix 2 "); printf("Rows: "); scanf("%d",&n2); printf("Coloumns: "); scanf("%d",&m2); int a[n1][m1]; int b[n2][m2]; printf("Enter the elements of matrix 1: "); for (int i = 0; i < n1; i++) { for (int j = 0; j < m1; j++) { scanf("%d",&a[i][j]); } } for (int i = 0; i < n1; i++) { for (int j = 0; j < m1; j++) { printf("%d\t",a[i][j]); } printf(" "); } printf(" "); printf("Enter the elements of matrix 2: "); for (int i = 0; i < n2; i++) { for (int j = 0; j < m2; j++) { scanf("%d",&b[i][j]); } } for (int i = 0; i < n2; i++) { for (int j = 0; j < m2; j++) { printf("%d\t",b[i][j]); } printf(" "); } printf(" "); // printf("%d",a[1][1]*b[1][1]); if (m1==n2) { int c[n1][m2]; for (int i = 0; i < n1; i++) { for (int j = 0; j < m2; j++) { for( k=0;k

[@saivigneshandalam]

❤❤

[@victorb22622]

You did complicated ,if you made array thst woukd be better instead asking value of matrix

[@BCAWala247]

Bro please I am getting pyaudio error I tried many times but it is not getting installed .It gives setup.py building and failed... Please help me ....

[@codewithswaraj6386]

Python uninstall kardao thik hojaga

[@vishalborate9608]

scanf("%d",&a[i][j]); this statement i'm not understood, plz give me reply plz 🙏

[@simranbains6199]

bhai maths to sahi thi but c ke loops me i,j,k me ab bhi confusion hai

[@eldrago3140]

Wasn't the program to take the input from the users first for the number of rows and columns and if the rows and columns are not of the correct format then an error should be shown.

[@jonnydhol9349]

yeah you can easily do that , at the start of the program using if , printf and scanf

[@pranavdeshmane9593]

@@jonnydhol9349it is easy to take input but the problem lies in code for matrix multiplication itself for e.g if u already know the matix row and col u can design code for that specific dimensions of matrix

[@musicalrajput1047]

Hlo bhai aapne C tutorial video main void type karke jo automatically jo aaya na syntax woh aa nahi raha hai mera? PLZ BATAO INSTA PAIN BHI AAP RELY NAHI DETE

[@rishantsinha6963]

Bro merey mai run ka option ni aa raha hai

[@everythingofficial2264]

undefined reference to winmain@16' collect2.exe error ld returned 1 exit status visual studio code sir plz solved i am in c

[@shashank4640]

The input that I am giving is not showing in a matrix form, every element is coming in a new line. Please tell me how to fix this.

[@rohitprasad1498]

Yes, I am also getting the same problem. After copying the code from his site then still it is working in the line manner.

[@shaharslan3372]

He's pressing enter after every 4 elements

[@vanshshah7781]

Use \t

[@manoor0858]

challenge failed :( too complex for me

[@Amith761]

Samaj mai nahi aya bhai 😢

[@RohanDasRD]

First

[@RohanDasRD]

@@InvinciRD Rice Field

[@ishanchakraborty6658]

Carry minati

[@PallabChatterjee18]

Where is the source code ?

[@talish7714]

bro maina to user define bana diya

[@sudhanshu_31]

copy past kardiya not explain

[@AryanSharma-zk6ql]

Bhai ka ans do

[@snehsingh933]

#python ERROR: Could not find a version that satisfies the requirement speechRecoginition (from versions: none) ERROR: No matching distribution found for speechRecoginition i want to install speechRecoginition please help me

[@indiangamersg2585]

Bro to install speech recoginition moduel you first have to install a module named pyaudio. To install the pyaudio you have to watch one or two yt video because ir's very difficult to download it. I somehow managed to install both of them.

[@ranojpayeng9313]

Ok

[@Ashish...114]

bs multiply krne k baad wo 3rd loop ka idea nhi aa rha tha banki sb ku6 mene kr diya tha abb mene wo ek for loop add krke complete kr diya h& my program can multiply: 2x2 3x3 4x4 5x5 6x6.... & so on of any Matrix if it can be multiplied! #Solution: #include #include int main() { int r1, c1, r2, c2, sum = 0; printf("Welcome to the Matrix multiplication calulater: "); printf("Please enter the no. of rows in first matrix: "); scanf("%d", &r1); printf("Please enter the no. of columns in first matrix: "); scanf("%d", &c1); int A[r1][c1]; printf("Please enter the no. of rows in Second matrix: "); scanf("%d", &r2); printf("Please enter the no. of columns in Second matrix: "); scanf("%d", &c2); int B[r2][c2]; int C[r1][c2]; printf("You have choosen %dX%d and %dX%d matrix, ", r1, c1, r2, c2); if (c1 != r2) { printf("Your matrix cannot be multiplied."); goto end; } printf("Now: fill the first matrix- "); for (int k = 0; k < r1; k++) { for (int m = 0; m < c1; m++) { printf("row:%d and column:%d ", k, m); scanf("%d", &A[k][m]); } } printf("Now: fill the second matrix- "); for (int k = 0; k < r2; k++) { for (int m = 0; m < c2; m++) { printf("row:%d and column:%d ", k, m); scanf("%d", &B[k][m]); } } printf("Your first matrix let say 'A' is: "); for (int i = 0; i < r1; i++) { for (int j = 0; j < c1; j++) { printf("%d\t", A[i][j]); } printf(" "); } printf("Your first matrix let say 'B' is: "); for (int i = 0; i < r2; i++) { for (int j = 0; j < c2; j++) { printf("%d\t", B[i][j]); } printf(" "); } printf("Here is your third matrix which is resultant of matrix A X matrix B "); printf(" Therefore, AXB = "); for (int i = 0; i < r1; i++) { for (int j = 0; j < c2; j++) { for (int k = 0; k < r1; k++) { sum += A[i][k] * B[k][j]; } C[i][j] = sum; sum = 0; } } for (int i = 0; i < r1; i++) { for (int j = 0; j < c2; j++) { printf("%d\t", C[i][j]); } printf(" "); } end: return 0; }

[@ibeshkhadka]

Kuch samajjj nahii aayaaaa Phir v thanks

[@chandrabhanbahetwar9638]

Bhai tumne code run kiya to shi chl rha h but maine usko copy krke run kiya to mtrix shi nhi bn rhi

[@woundman6521]

Same problem. Did u solved it? If Yes plz specify your doubt. Else if printf"0" ;

[@Alwayspositive-pf1yf]

Complexes program 😢

[@jayshreeramforever]

itni jldi krte ho samaj mai ya na aye

[@santoshbhusal8432]

i have mistake in c program

[@chandrabhanbahetwar9638]

Kuch glt h lg rha h

[@chandrabhanbahetwar9638]

aayega khi

[@gunmun2005]

firBHI samajh nai aya

[@LawSupportInsurance]

I dont know if you are still reading this comment or not... but the matrix multipication in the beginning that you tried to make us understand is not very complex as you showed.... Should have better Used numbers instead of variables..... Anyways great video helping me so far...... 61th Video im watching from the beginning of the series

[@sallu_-bhai]

#include int row1, column1, row2, column2; int main(int argc, char const *argv[]) { printf("Enter size of Row 1: "); scanf("%d", &row1); printf("Enter size of column 1: "); scanf("%d", &column1); printf("Enter size of Row 2: "); scanf("%d", &row2); printf("Enter size of column 2: "); scanf("%d", &column2); int a[row1][column1], b[row2][column2]; for (int i = 0; i < row1; i++) { for (int j = 0; j < column1; j++) { printf("Enter row %d and column %d : ", i + 1, j + 1); scanf("%d", &a[i][j]); } } printf(" Now input 2nd matrix "); for (int i = 0; i < row2; i++) { for (int j = 0; j < column2; j++) { printf("Enter row %d and column %d : ", i + 1, j + 1); scanf("%d", &b[i][j]); } } if (column1 != row2) { printf("Matrix multiplication is possible only if column of 1st matrix is equal to row of second matrix"); } else { int c[column1][row2]; for (int i = 0; i < column1; i++) { for (int j = 0; j < row2; j++) { c[i][j] = 0; for (int k = 0; k < column2; k++) { c[i][j] += a[i][k] * b[k][j]; } } } for (int i = 0; i < column1; i++) { for (int j = 0; j < row2; j++) { printf("%d ", c[i][j]); } printf(" "); } } return 0; }

[@ramansinghthakur2216]

i need your help harry sir how can i contact you .....?????

[@tanmay_b_07]

solution 21-06-24 //tany #include int main() { int a, b, c, d, sum=0; printf("please input rows of first matrix:"); scanf("%d", &a); printf("please input column of first matrix:"); scanf("%d", &b); printf("please input rows of second matrix:"); scanf("%d", &c); printf("please input column of second matrix:"); scanf("%d", &d); int arr[a][b]; int array[c][d]; if (b == c) { for (int i = 0; i < a; i++) { for (int j = 0; j < b; j++) { printf("Enter the %d%d element of first matrix:", i + 1, j + 1); scanf("%d", &arr[i][j]); } } printf("********************************************* "); for (int i = 0; i < c; i++) { for (int j = 0; j < d; j++) { printf("Enter the %d%d element of second matrix:", i + 1, j + 1); scanf("%d", &array[i][j]); } } int array2[a][d]; for (int i = 0; i < a; i++) { for (int j = 0; j < d; j++) { for (int k = 0; k < b; k++) { sum += (arr[i][k] * array[k][j]); } array2[i][j]=sum; sum=0; } } printf(" the result is "); for (int i = 0; i < a; i++) { for (int j = 0; j < d; j++) { printf("%d",array2[i][j]); if(j

[@CodeVerse562]

#include #include // Title: Matrix multiplication int main() { // Rows and columns of matrix int r1, c1, r2, c2; printf("Enter rows in 1st matrix: "); scanf("%d", &r1); getchar(); printf("Enter columns in 1st matrix: "); scanf("%d", &c1); getchar(); printf(" Enter rows in 2nd matrix: "); scanf("%d", &r2); getchar(); printf("Enter columns in 2nd matrix: "); scanf("%d", &c2); getchar(); printf(" "); // Declaring the matrix int matrix1[r1][c1], matrix2[r2][c2]; // Entering the value of 1st matrix printf("Enter value of 1st matrix... "); for (int i = 0; i < r1; i++) { for (int k = 0; k < c1; k++) { printf("Enter %d, %d element: ", i, k); scanf("%d", &(matrix1[i][k])); getchar(); } } printf(" "); // Entering the value of 2nd matrix printf("Enter value of 2nd matrix... "); for (int i = 0; i < r2; i++) { for (int k = 0; k < c2; k++) { printf("Enter %d, %d element: ", i, k); scanf("%d", &(matrix2[i][k])); getchar(); } } int resultingmatrix[r1][c2]; for (int i = 0; i < r1; i++) { for (int k = 0; k < c2; k++) { resultingmatrix[i][k] = 0; } } if (c1 != r2) { printf("Matrix can't be multiply... "); } else { // Calculating the values of resulting matrix for (int i = 0; i < r1; i++) { for (int k = 0; k < c2; k++) { for (int j = 0; j < c1; j++) { resultingmatrix[i][k] += (matrix1[i][j] * matrix2[j][k]); } } } } // Showing the resulting matrix printf(" The resulting matrix is this... "); for (int i = 0; i < r1; i++) { for (int k = 0; k < c2; k++) { printf("%d ", resultingmatrix[i][k]); } printf(" "); } return 0; }

[@varunkolanu]

#include int main() { int m1,n1,m2,n2; printf(" Let 1st matrix be A and 2nd matrix be B "); printf("Enter the no. of rows in matrix A: "); scanf("%d",&m1); printf("Enter the no. of columns in matrix A: "); scanf("%d",&n1); printf("Enter the no. of rows in matrix B: "); scanf("%d",&m2); printf("Enter the no. of columns in matrix B: "); scanf("%d",&n2); if(n1!=m2) { printf(" The matrices can't be multiplied"); printf(" since no.of columns in A should be equal to no.of rows in B"); } else { printf(" "); printf("Aij means element of matrix A in ith row and jth column "); printf("Bij means element of matrix B in ith row and jth column "); int A[m1][n1], B[m2][n2]; printf("Enter the values of A: "); for(int i=0;i

[@SwarnadipDutta]

#include #include void take_matrix(int **a, int rows, int columns) { for (register int i = 0; i < rows; i++) { for (register int j = 0; j < columns; j++) { printf("Element no.(%d,%d) = ", i + 1, j + 1); scanf("%d", (*(a + i) + j)); } } } void print_matrix(int **a, int rows, int columns) { for (int i = 0; i < rows; i++) { for (int j = 0; j < columns; j++) { printf("Element no.(%d,%d) = %d ", i+1, j+1, *(*(a + i) + j)); } } } int main() { int a_rows, a_columns; printf("Enter the number of rows for matrix A : "); scanf("%d", &a_rows); int **a = (int **)malloc((a_rows) * sizeof(int *)); printf("Enter the number of columns for matrix A : "); scanf("%d", &a_columns); for (int i = 0; i < a_columns; i++) { *(a + i) = (int *)malloc((a_columns) * sizeof(int)); } printf(" "); int b_rows, b_columns; printf("Enter the number of rows for matrix B : "); scanf("%d", &b_rows); int **b = (int **)malloc((b_rows) * sizeof(int)); printf("Enter the number of columns for matrix B : "); scanf("%d", &b_columns); for (int i = 0; i < b_columns; i++) { *(b + i) = (int *)malloc((b_columns) * sizeof(int)); } if (((a != NULL && b != NULL) && (a_columns == b_rows))) { for (int i = 0; i < a_columns; i++) { if (*(a + i) == NULL) { printf("Not enough memory! "); for (int i = 0; i < a_columns; i++) { free(*(a + i)); } return 1; } } for (int i = 0; i < a_columns; i++) { if (*(b + i) == NULL) { printf("Not enough memory! "); for (int i = 0; i < b_columns; i++) { free(*(b + i)); } return 1; } } printf(" "); printf("Enter matrix A elements : "); take_matrix(a, a_rows, a_columns); printf(" "); printf("Enter matrix B elements : "); take_matrix(b, b_rows, b_columns); int **result = (int **)malloc(a_rows * sizeof(int *)); for (int i = 0; i < b_columns; i++) { *(result + i) = (int *)calloc((b_columns), sizeof(int)); } if (result == NULL) { for (int i = 0; i < b_columns; i++) { free(*(result + i)); } free(result); return 1; } printf(" "); for (int i = 0; i < a_rows; i++) { for (int j = 0; j < b_columns; j++) { for (int m = 0; m < a_rows; m++) { result[i][j] += a[i][m] * b[m][j]; } } } printf("The multiplied matrix C = A*B is : "); print_matrix(result, a_rows, b_columns); for (int i = 0; i < b_columns; i++) { free(*(result + i)); } free(result); } if (a_columns != b_rows) { printf("No. of columns of matrix A and rows of matrix B must be the same. "); } for (int i = 0; i < a_columns; i++) { free(*(a + i)); } free(a); for (int i = 0; i < b_columns; i++) { free(*(b + i)); } free(b); return 0; }

[@realism2463]

Fully explained ---> #include int main(int argc, char const *argv[]) { int r1, r2, c1, c2, sum = 0; printf("Enter no. of rows of first matrix : "); scanf("%d", &r1); printf("Enter no. of rows of second matrix : "); scanf("%d", &r2); printf("Enter no. of column of first matrix : "); scanf("%d", &c1); printf("Enter no. of column of second matrix : "); scanf("%d", &c2); int matrixA[r1][c1], matrixB[r2][c2], product_matrix[r1][c2]; for (int i = 0; i < r1; i++) { for (int j = 0; j < c1; j++) { printf("a[%d][%d] = ", i, j); scanf("%d", &matrixA[i][j]); } } for (int i = 0; i < r2; i++) { for (int j = 0; j < c2; j++) { printf("a[%d][%d] = ", i, j); scanf("%d", &matrixB[i][j]); } } printf(" Matrix A = "); for (int i = 0; i < r1; i++) { for (int j = 0; j < c1; j++) { printf("%d ", matrixA[i][j]); } printf(" "); } printf("Matrix B = "); for (int i = 0; i < r2; i++) { for (int j = 0; j < c2; j++) { printf("%d ", matrixB[i][j]); } printf(" "); } for (int i = 0; i < r1; i++) { for (int j = 0; j < c2; j++) { for (int n = 0; n < r2; n++) { sum += matrixA[i][n] * matrixB[n][j]; } product_matrix[i][j] = sum; sum = 0; } } printf("Matrix after multiplication = "); for (int i = 0; i < r1; i++) { for (int j = 0; j < c2; j++) { printf("%d ", product_matrix[i][j]); } printf(" "); } return 0; }