C Archives - Page 16 of 22

The Definitive C Book Guide and List

This question’s answers are a community effort. Edit existing answers to improve this post. It is not currently accepting new answers or interactions. ...

May 8, 2022
0 Comments

What is the LD_PRELOAD trick?

I came across a reference to it recently on proggit and (as of now) it is not explained. I suspect this might be ...

May 8, 2022
0 Comments

How do I concatenate const/literal strings in C?

I’m working in C, and I have to concatenate a few things. Right now I have this: message = strcat("TEXT ", var); message2 ...

May 8, 2022
0 Comments

How to printf “unsigned long” in C?

I can never understand how to print unsigned long datatype in C. Suppose unsigned_foo is an unsigned long, then I try: printf("%lu\n", unsigned_foo) ...

May 7, 2022
0 Comments

Is It Possible to NSLog C Structs (Like CGRect or CGPoint)?

I want to be able to debug C structures without having to explicitly type every property that they consist of. i.e. I want ...

May 7, 2022
0 Comments

How do you format an unsigned long long int using printf?

#include <stdio.h> int main() { unsigned long long int num = 285212672; //FYI: fits in 29 bits int normalInt = 5; printf("My number ...

May 6, 2022
0 Comments

How can I get a file’s size in C? [duplicate]

This question already has answers here: How do you determine the size of a file in C? (14 answers) Closed 2 years ago. ...

May 6, 2022
0 Comments

Why do all the C files written by my lecturer start with a single # on the first line?

I’m going through some C course notes, and every C program source file begins with a single # on the first line of ...

May 6, 2022
0 Comments

Is Fortran easier to optimize than C for heavy calculations?

From time to time I read that Fortran is or can be faster then C for heavy calculations. Is that really true? I ...

May 6, 2022
0 Comments

Difference between a Structure and a Union

Is there any good example to give the difference between a struct and a union? Basically I know that struct uses all the ...

May 5, 2022
0 Comments