exchange 2 integers using pointers in c

exchange_integers_with_pointers.c

// Using pointers to exchange values
 
#include <stdio.h>
 
void exchange_values( int  * const pint1, int * const pint2)
{
	int temp;
 
	temp = *pint1;
	*pint1 = *pint2;
	*pint2 = temp;
}
 
int main(void)
{
	void exchange_values( int * const pint1, int * const pint2);
 
	int i1 = -5; int i2 = 66, *p1 = &i1, *p2 = &i2;
 
	printf(" i1 = %d, i2 = %d\n", i1, i2);
 
	exchange_values(p1, p2);
	printf(" i1 = %d, i2 = %d\n", i1, i2);
 
	exchange_values(&i1, &i2);
	printf(" i1 = %d, i2 = %d\n", &i1, &i2);
 
	return 0;
 
 }