swap fucntion

swap.c

#include <stdio.h>

/**
 * swap function
 * @param xp pointer x
 * @param yp pointer y
 * */
void swap(long *xp, long *yp) {
	// define temporary values
	long temp0 = *xp;
	long temp1 = *yp;

	// swap values
	*xp = temp1;
	*yp = temp0;
}

/**
 * entry point
 * */
int main(void) {
	// define values
	long x = 10;
	long y = 12;

	// print values
	printf("before swap: %ld %ld\n", x, y);

	// swap values
	swap(&x, &y);

	// print values
	printf("after swap: %ld %ld\n", x, y);
}