Lecture 42: OOPs Concepts in C++ || Part-1

[@Manjot_singh2002]

1. Padding is introduced in memory allocation to ensure proper alignment of data within structures. CPUs have specific memory alignment requirements for different types of data. When you have a structure containing different data types, the compiler might insert "padding bytes" between members to align them according to the CPU's requirements. 2. Greedy alignment refers to the practice of arranging the members of a structure or class in such a way that padding is minimized. By placing members with larger alignment requirements before those with smaller alignment requirements, you can potentially reduce the amount of padding required. In languages like C++, where memory layout has a significant impact on performance due to cache lines and memory access patterns, arranging members to minimize padding can lead to better memory utilization and potentially improved runtime efficiency.

[@mridulsehgal6783]

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Thanks brother 👍

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Worth watching for 1.5 hr. Understood Everything. Great 👍. Keep it up.

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After 3 months my placement are coming and this course is very helpful in reversing the concepts and making me more confident In coding . I will recommend this channel to my juniors for learning dsa at an excellent level. Thankyou sir for making this course

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[@111rhishishranjan2]

You are too late man.These lectures are just basic

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[@helloworld2054]

Engineering will always be better

[@anshulkumar7871]

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It took me a day to complete this. There were so many things to tinker with. I solidified what I learned here. Did quite a lot of experiments. SHAKTIMAN++

[@ansh2647]

bhai toh lagataar ek baar mai dekha kyuki merko pura din laga notes banana smjhna?

[@eagerwolverine3919]

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[@Relaxingmusic-nk7py]

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[@sagarthapliyal828]

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[@KundanKumar-bt1rn]

Never compromised with content, does't matter how much time needed.. Great work bhaiya :)

[@HeyyRomii]

"Grid Alignment" refers to arranging data members according to the system's memory boundaries, and "Padding" involves adding extra bytes to achieve proper alignment of data members within classes or structures in Object-Oriented Programming.

[@sahilchalke6245]

That concept of padding and greedy alignment was so cool . I'm watching this lecture after college and I was a little dizzy , but after that I'm ready to go for another hour .

[@vedantkesarwani4006]

i have never watched an educational video so long in one go .This felt like a movie which not let you leave your seat .. So good and kept up hold to study for long hour::

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Very understanding videos.... Examples are real life thing.... Anybody can understand your video bhaiya💗❤️

[@tanmayghosh8311]

1:01:00 solution :- #include "include this library" to your program

[@BBCNFUSION001]

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[@daiict2282]

Never seen oops concept like this you explained every concept deep

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[@godzilla5111]

Homework Solutions - 01:16:47 1. **`const` Keyword**: The `const` keyword in C++ signifies that something cannot be modified. When applied to variables, it means the variable's value can't be changed. For pointers, it can mean that the pointer can't change what it points to or that the data it points to can't be changed, depending on its placement. ```cpp const int x = 10; // x cannot be modified ``` 2. **Using `const` in Object Creation and Member Data**: - **Object Creation**: When you declare an object as `const`, it means you can't modify any of its data members (unless they are declared as `mutable`). ```cpp const MyClass obj; // obj's members cannot be modified ``` - **Member Data Types**: When a class data member is declared as `const`, it means that member cannot be modified after the object is constructed. ```cpp class MyClass { private: const int x; // x must be initialized in the constructor and cannot be modified afterwards }; ``` 3. **`const` Functions**: A member function that is declared `const` promises not to modify any non-mutable member variables of the object for which it's called. This allows you to call the function on a `const` object. ```cpp class MyClass { public: int value = 0; int getValue() const { // A const member function return value; } void setValue(int v) { // Non-const member function value = v; } }; const MyClass obj; int x = obj.getValue(); // OK to call // obj.setValue(5); // Error, because setValue is not a const function ``` 4. **Initialization List**: Initialization lists are used in C++ to directly initialize data members of a class. They are particularly useful for initializing `const` members, member objects without a default constructor, and reference members. ```cpp class MyClass { private: const int x; int &y; // Reference to an integer public: MyClass(int value, int &ref) : x(value), y(ref) { // x and y are initialized using an initialization list } }; int main() { int externalInt = 5; MyClass obj(10, externalInt); } ``` In the above `MyClass`, the `x` member is a `const` integer and must be initialized using an initialization list in the constructor. The `y` member is a reference and also must be initialized using the initialization list.

[@abhishekraibagi8239]

thank you so much..

[@Pwcouponpro]

Chatgpt

[@amarjitrohit8819]

bro which IDE he is using

[@harshi5265]

@@amarjitrohit8819 Visual Studio Code

[@007_roushankumar7]

watched this video 2 times and now i feel lot of comfidence when someone talks about OOPs 😃😃

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Keep the pace high!! As we are getting back to online classes I can give maximum time to this. Present bhaiya Lots of love❤

[@KajalSingh-if4uu]

which sem?

[@sherebanoburhani8939]

@@KajalSingh-if4uu 1st semester

[@only_for_fun1234r]

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[@Me123-m4k]

usually i don't comment on any video.. but this time can't stop my finger....thank you thank you so much sir ... for making my concepts clear and giving me confidence...... :)........

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aapne paul ka hoa yaaad dualaya bhot achha lga sunke... thats why i love your content sir... its not just plain studying.. you relate everything.. nothing seems boring and hours and hours go away without even noticing..... god bless you siir !!!!!!

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Simply Wow! Get to learn some new concepts in addition to what i have learned.

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[@maheshchoudhary5605]

Much awaited video aa gayi hai, bcoz ab tak sirf theory padh rahe the but is bar interview me kaise pucha jata hai, uske according padhne wale hai. So excited for this.

[@MdRizwan-uu9dv]

Padding is used to prevent the unnecessary wastage of CPU cycle by creating empty block in memory. But Greedy alignment ka koi refrence nahi mil raha hai bhaiya.

[@ayushgoel4145]

Also called as Data Structure Alignment, just search its available on GFG.

[@akshaysinghbhadoriya7967]

greedy alignment mtlb ki data type ko particular way me alighn krna taaki vo minium processing cycle me jyada data types ko fetch aur process kr paye

[@nik7867]

It’s on javatpoint

[@abhiramgottiparthi9366]

The depth of the conceptsis just amzing

[@rohan1765]

Going to see it tomorrow but thank you so much for the consistency brother, god bless you.

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I really want to thank you for making combined play list for cpp and dsa thank you so much really appreciated once again thank you

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All things are clear and concise....Thanks Babbar Bhaiya

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Your method of teaching is outstanding sir you deserve millions likes and subscriber👀🔥

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[@sagarpokhriyal6926]

Finally! Oops concept is here. Op consistency 😎

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Paul's supperpunch,jin kazama everything was just ❤

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With these kind of videos no one can stop getting me placed in top MNC's.

[@vinayaksharma7134]

thankyou

[@shubhamsood589]

Hello sir Just a small suggestion. Can you also share the resources which you follow to prepare for videos, so that we can also deep dive into the topic apart from watching video.

[@SmartVideoCreation977]

vs code u will get in google

[@ashutoshrawat6583]

Best"est" Lecture on OOPs by far bhaiya!Hats off👏

[@namanshah2688]

bhaiya your oops series is one of the best on you tube bty sir aapne videos ni dale kuch dino se ?... just asking.

[@mr.writer2903]

litterly i saw this 3 times for more and more better understanding

[@arncs5587]

Finally I got this topic. I am waiting for this topic since last couple of days.....🙏 Thank u bro.....🙏🙏🙏😂😂🥳🥳

[@only_for_fun1234r]

Learn new concept after watching 3 4 videos from other ytubers ,u r great sir

[@RohitRana-tz2lr]

Thanks bhaiya for teaching OOP's concept in so much depth and details... there are so many things which are new to me and I have understood them.... joshHigh++

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[@aniketmukhopadhyay2271]

Bro , is this two videos are enough for semester exam?

[@kanaklata3421]

@@aniketmukhopadhyay2271 yes they are enough but make sure to practice a lot and clear your doubts while practicing at that time only by yourself and you are good to go not only for exams but for anything

[@priyabharti2818]

This is the best explanation of oops concept..!! Startingly i got rejected in technical rounds because i don't know much about oops..!! When i completed these two videos of oops then i'm getting qualified in technical and getting rejected in hr rounds.. double oops...!!😂..!! Finally i made it..!! And got selected..!! Thank you so much...!! Your whole series of this DSA concept is awesome..and this oops is just fab...!!!

[@adityaraj04]

Where did you get the job? Did you just watched only this playlist?

[@amaan1180]

Where did you get placed.... Did you follow just this playlist or something extra too @priyabharti2818

[@BabaJaniSarkar877]

Padding meaning in Urdu " Bahrti - karna " matlab ka add karna char ' A '; ' A ' ki value hexa-decimal ma 10 hoti ha A = 10; 10 ko binary ma convert karana ka liya hama 2 ka sath LCM lana ho ga A = 10 = (1010) or is ki base 2 sa multiply karan ga In Right-side-start 0 = 2 ^ 0 = 1 1 = 2 ^ 1 = 2 0 = 2 ^ 2 = 4 1 = 2 ^ 4 = 8 so 1byte = 8 bits = 4 parts ( 1, 2 , 4 , 8 ) So A will be store in 1 and 2 , 4 , 8 is empty so In case off padding its also be store or add empty values

[@sheetaltomar9115]

you are such an amazing teacher.!!

[@amanasrani6405]

29:09 it seems like some important message had been seen by sir🌻

[@tanayvekariya1268]

Thank you, sir, for such awesome lectures, it really helps a lot in the time of need...

[@darshgupta1021]

these 2 videos got me a 14lpa job!!

[@studyplus7144]

Congratulation

[@studyplus7144]

Kya aapne dsa love bhaiya se hi kiya tha

[@darshgupta1021]

yes bro @@studyplus7144

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Meanwhile Ramesh ,"Abe yaar main itna famous hogya" 😂🤣😂😂

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😂😂

[@muntahaatif5828]

Thank you sir apk is lec say mera oop ka paper acha hogea, pehli bar mujay oop programming sai say smaj ai hai ❤🎉🎉

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Meri kal exams hai aur Mai Aaj lecture dekh Raha hu 😅😢😅

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Meri be kal exams hain 😅😅

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Meri abhi 2 ghante mein hain.😅

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[@43_riteshroy13]

51.41 gajb bazzati hai

[@syedmuneeb3779]

best video for learning oop. i have seen many channels but this one is flawless.

[@therealartist9]

wasted 1 hour and not learnt something , sorry bhaiya but constructor is something complicated and pls tell the need before explaining it

[@tousifjaved3485]

Constructor is used to initialize object without using external methods He has explained everything very nicely

[@Sppuuuuuuyy4667]

Bhai kaunse channel par badhiya se sikhaya hai constructor?? Pls batana agar pata hai toh

[@rounakrajput3928]

Code with Harry

[@intisheno6950]

Bhai to pehlii basic seek lay phir akay constructor dhek layna

[@The_Shubham_Soni]

Finally understood the actual meaning of (this pointer) after so many years!!!

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Brother, I really felt this was not well explained by you! Maybe I'm wrong because so many here are praising you , but I gave my best to this lecture and think it's so so so confusing!

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*MORE INTERESTING THEN MOVIES *😅😅😅

[@sanjaygatne1424]

int is not always 4 bytes, it depends on platform. it is at least 2 bytes and max 4 byte , as per c++ specification till now.

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broo...love you.

[@zeeshan1019]

Finally completed ❤

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tekken and paul phoenix reference🥲brings back old memories .

[@harshitkumar-1325]

Ye series ka notes kaha hai bata do please

[@vslraw4202]

@@harshitkumar-1325 bhai video k description m rehta hai notes link aur code link

[@TrendyGamer007]

tekken 3 paul was my favourite character in tekken .

[@hare_krishana_108]

Thank a lot ❤❤

[@suyashverma156]

watched till end! kaffi lamba tha but worth it tha time invest krna isme

[@manishrawat3791]

Bhaiya sahi chl rhe hai bss ese he m aur mere sath k babbar class k mates agle 6 month m ya 1 year koi achi job fod dengey and sach bolu toh app he sabsi motivation ho reason btane ki jaruart nh but fir bh bta deta hu continues classes till today esa koi nh krta aur nahi ab tk mene koi dekha hai thankyou from one of your student!! vase job k baad apke channel m interview toh logey na mera........?? till that day let's learn something new today too.......

[@dakshchandore6435]

best teacher on youtube for coding

[@NishantSharmaddn]

Padding vala bahut sahi bataya...kabhi kisi ne YT me nahi bataya.

[@abhinavjha2896]

bhaiya aapko na isse 2 part mein padhana chayea tha ek saath access modifier constructor sb bta diye to the point bolu to muze constructor samaz nhi aaya ab dubara dekhunga but aage se 40-45 min ka hi video bnana

[@anmolsaxena45]

Padding is the addition of some empty bytes of memory in the structure to naturally align the data members in the memory.

[@umangsharma9993]

Boht badhiya ,Boht badhiya.

[@iteself_me]

love you bhaiya❤

[@jalesasanty9697]

Is video ko dekh ke logo ki placement lagi hai bhaiya Dil se respect++

[@IshikaAgrawalISE--]

very informative lecture, thank you bhaiya!

[@I_Anupam_Pandey]

Lecture 42 attendance bhaiya keep going with this amazing dsa series

[@muzammilkhan403]

I have learned oops in python and this lecture cleared my concept about oops in c++. Im starting DSA in c++

[@mrtechnostart]

ramesh hero nhi gunda hai 🙂🙂

[@bhawargujral3574]

Great explanation of OOPS.🤩🤩🤩🤩🤩🤩 Keep up the good work

[@aarav-anish]

Timestamp- 9:15 Please talk about structural padding and packing sizeof will not give 5 if class contains an int followed by a char or vice versa This video is very helpful. Thanks Babbar

[@bhavnaparvataneni8722]

best tutor online, bhaiyya saare doubts in depth clear hogaye!

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Thank you so much bhaiya apka channel crores m views paae aur hindustan k Engineer to skills pradan kre

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Maza aa gaya bhaiyaaa we will keep our josh high ❤️❤️

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very good content must watch

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jiska thaa, saalo se intezar wo video aa gayi aa gayi ...... 😀😀

[@pawankumarpandit1822]

love you love bhaiya

[@063himanshumishra4]

Finally return of 1 hour video... Really missing these videos..

[@yash_verma]

Good structure & examples

[@JustwaitNwatch-w]

Greedy align and padding i searched myself and got to know that Our operationg system is of 32/64 bits And if our OS is 64 bits it means that the compiler will read 8 bytes at a time if OS of 32 bits compiler will read 4 bytes at a time Here as we have one int and one char which mskes up 5 bytes the rest 3 bytes will be added as padding so that compiler can read 8 bytes easily ... This also leads to memory wastage ... This is what i got to know after searching .... Please correct me if i sm wrong

[@thetradingtarzan]

bhaiya... bhaiya phle majburi m shuru kiya tha lekin ab mja aane lga h