How to resolve “conflicting types error” in C?

Question

For the following C code (for swapping two numbers) I am getting the \"conflicting types\" error for swap function:

#include 
#includ         


        

Answer 1

You need to declare swap before using it. For example, put swap above main, or add a prototype for swap like this:

void swap(void *,void *,int);
int main () 

Incidentally main should be int not void and usually it returns the value zero, unless there is an error.