#include <stdio.h>
void swap(int x, int y)
{
int tmp;
tmp = x;
x = y;
y = tmp;
}
int main(void)
{
int a = 10, b = 20;
swap(a, b);
printf("swap() È£ÃâÈÄ a=%d b=%d\n", a, b);
return 0;
}