C (GCC) Online Compiler & Code Runner
Compile C programs online with modern GCC. Practice pointers, memory management, and fundamental DSA structures without setting up local toolchains.
Standard C11 Support
Compile with GCC including `stdio.h`, `stdlib.h`, and `string.h`.
Popular C (GCC) Examples
Pointers & References
Pointer arithmetic and memory addressing in C.
#include <stdio.h>
void swap(int *a, int *b) {
int temp = *a;
*a = *b;
*b = temp;
}
int main(void) {
int x = 10, y = 20;
swap(&x, &y);
printf("x = %d, y = %d\n", x, y);
return 0;
}Ready to Practice Real Interview Problems in C?
Solve 370 curated problems merged from Striver A2Z, Love Babbar 450, and Apna College with zero duplicate questions.
Frequently Asked Questions
Can I use malloc and free?
Yes, dynamic memory allocation with `<stdlib.h>` is fully supported.