传址调用
#include<stdio.h>
void swep(int*x,int*y)
{
int p = 0;
p = *x;
*x = *y;
*y = p;
}
int main()
{
int a = 10;
int b = 20;
printf("交换前:%d%d",a, b);
swep(&a,&b);
printf("交换后:%d%d", a, b);
return 0;
}运行结果:
#include<stdio.h>
void swep(int*x,int*y)
{
int p = 0;
p = *x;
*x = *y;
*y = p;
}
int main()
{
int a = 10;
int b = 20;
printf("交换前:%d%d",a, b);
swep(&a,&b);
printf("交换后:%d%d", a, b);
return 0;
}