使用函数实现两个数的交换

#include
#include
void swop(int* a, int* b) {
	int tmp;
	tmp = *a;
	*a = *b;
	*b = tmp;
}
int main() {
	int x = 10;
	int y = 20;
	swop(&x, &y);
	printf("x=%d y=%d", x, y);
	system("pause");
	return 0;
}