初次使用指针

#include<stdio.h>void swap(int *pa, int *pb);int main(){    int a=5, b=6;    swap(&a, &b);    printf("a=%d b=%d", a, b);    return 0;}void swap(int *pa, int *pb){    int t;    t = *pa;    *pa = *pb;    *pb = t;}