error: unknown type name ‘bool’?

I downloaded the source code and wanted to compile the file of scanner. It produces this error: [meepo@localhost c...

warning: incompatible implicit declaration of built-in function ‘xyz’?

I'm getting a number of these warnings when compiling a few binaries: warning: incompatible implicit declaration o...

What is difference between use &a and a?

What is the difference read a number to &a and just a int main(int argc, char** argv) { int a; printf(...

munmap_chunk(): invalid pointer?

I've spotted the error in my program and decided to write a simple one, which would help me understand what's going ...

munmap_chunk(): invalid pointer?

I've spotted the error in my program and decided to write a simple one, which would help me understand what's going ...

Invalid type argument of unary '*' (have 'int') Error in C?

#include <stdio.h> #include <stdlib.h> /* * */ int main() { int a[] = {5, 15, 34, 54, 14, 2, 52...

Printing long int value in C?

I have two variables of long int type as shown below: long int a=-2147483648, b=-2147483648; a=a+b; printf("%d",a)...

Assembly testq and cmovg instruction?

What does the following do? testq %rdx, %rdx cmovg %rcx, %rax I understand that testq is a bitwise and betwee...

What is the difference between “rb+” and “ab” in fopen()??

I do not understand the difference between the "ab" and "rb+" modes when using fopen() in C. Why would I choose one...

what char ch = ‘Z’ would store in ch??

As i am confuse what will ch stored in it. is it ascii value or 'z' as some sites are saying it stores ascii and som...

How to add zeros after the significant digits after decimal in C??

double r; float a; scanf("%lf",&r); a=M_PI*pow(r,2); printf("%.*f",6,a); The output is 12.566371 but I want th...

What is the scope of a 'while' and 'for' loop??

What is the scope of a while and for loop? For example, if I declared an object within the loop, what is its behavi...