C reading files 🔎

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C reading files 🔎

Рет қаралды 49,224

2 жыл бұрын

C read a file tutorial example explained
#C #read #file
int main()
{
FILE *pF = fopen("poem.txt", "r");
char buffer[255];
if(pF == NULL)
{
printf("Unable to open file!
");
}
else
{
while(fgets(buffer, 255, pF) != NULL)
{
printf("%s", buffer);
}
}
fclose(pF);
return 0;
}

Пікірлер: 34

@BroCodez 2 жыл бұрын

#include int main() { FILE *pF = fopen("poem.txt", "r"); char buffer[255]; if(pF == NULL) { printf("Unable to open file! "); } else { while(fgets(buffer, 255, pF) != NULL) { printf("%s", buffer); } } fclose(pF); return 0; }

@mounikareddy6395 2 жыл бұрын

how can we do it using fscanf?!

@CorneliusCorndogJr Жыл бұрын

your poem was truly the GOAT of all poems and to think you are a code youtuber

@QuimChaos Жыл бұрын

if anyone is getting an error/segmentation fault when testing with a non existent file, move the fclose() inside the else. fclose can't close a file that is not open so it will segment fault...

@seancantwell12 Ай бұрын

Good catch!

@provokator-provocateur7603 2 жыл бұрын

Best explanation for reading files on youtube!

@immunewhatsapp Ай бұрын

In my opinion there are no better teaching channel than 'bro code'';

@ramiltaghiyev9712 Жыл бұрын

Roses are red Violets are blue This video is awesome Scooby doo be doo

@PSIwolf39 7 ай бұрын

Here's code I made to read a file: #include #include #include #include #include #include #include int main(){ FILE *pFile = fopen("C:\\Users\\squee\\Desktop\\Hello.txt","r"); if(pFile == NULL){ printf("Hello.txt does not exist :("); } else{ char buffer[256]; while(fgets(buffer,256,pFile) != NULL){ printf("%s",buffer); } } fclose(pFile); }

@jazzyBSD 7 ай бұрын

great, but u don't need all the #includes

@itsme-Priyaravi Ай бұрын

This video saved me from a big disaster!!!! tq so much....

@sodatechtips 3 ай бұрын

Just a quick message, you do not need != NULL in aloop, since when function fails, an execption is thrown automTically

@Mukhlisbek 5 ай бұрын

Very useful Thank you very much Hope you will keep making such useful contents

@salatatoe6812 2 жыл бұрын

Hey man awesome video! Would it be possible if you made a video on registering a word and line number where the word first appears in a dictionary? And then print the words and line numbers. Have an awesome day!

@Jordan-qi2dn 2 ай бұрын

I noticed some weird behaviour with this one, what could the case be? Initially I made a text document with 3 lines, the while loop skipped the first line and printed the remaining 2 no problem. I edited the file and put the numbers 1-6 on respective lines, and it only printed the even ones. I don't understand why this is happening!

@lord_toker Жыл бұрын

What if I want to read from a specific line? Using your file as an example, what would I need to do to make it read just BOOTY BOOTY BOOTY BOOTY in stdout?

@connerd5295 10 ай бұрын

if you know the number of which line BOOTY BOOTY BOOTY BOOTY is on, you can make a counter which counts each loop and put the print statement inside an if(counter == the correct line number). then the program wont print any of the other lines in the file.

@GavinDaGrey 9 ай бұрын

Your videos are goated, subscribing fs

@yorshex 2 жыл бұрын

4:00 why not to just cloes file and return 1 in this if statement?

@gerdsfargen6687 Жыл бұрын

Tried this on a C compiler on an Android. Result is "Segmentation fault/core dumped". What gives?

@lord_toker Жыл бұрын

Android file system =/= Windows file system is my guess

@youssofprogrammer7546 Жыл бұрын

I love your videos man

@allmyinterests5139 6 ай бұрын

Very nice explanation thank you so much! I only got one question: your char array consists of 255 chars and you allow fgets() to read 255 characters. But a string always needs \0 at its end so I am used to either declare the string like: char buffer[255 + 1] or read one element less like: fgets(buffer, 254, pF). Isn't that necessary when reading files or was it a mistake in the code? Cheers!

@seancantwell12 Ай бұрын

From ChatGPT: You're correct. A null-terminator (`\0`) is necessary to mark the end of a C string. If you have an array of 255 characters, reading exactly 255 characters without accounting for the null-terminator can lead to undefined behavior or buffer overflow issues.