pointer 交换两数

输入两数a,b,交换值后输出

#include <stdio.h>

void swap(int *pa, int *pb)
{
    int t;
    t = *pa;
    *pa = *pb;
    *pb = t;
}

int main()
{
    int a, b;
    printf("input two numbers: 
");
    scanf("%d", &a);
    scanf("%d", &b);
    swap(&a, &b);
    printf("a=%d, b=%d
", a, b);
    return 0;
}