C语言利用指针交换两个变量的值

#include <stdio.h>

void swap(int* p, int* q) {
	int t;
	t = *p;
	*p = *q;
	*q = t;
}

int main()
{

	int a = 5, b = 10;
	swap(&a, &b);

	printf("");
}