题目内容

以下程序的输出结果是( )。#include void swap(int pa,int pb){int t;t=pa;pa=pb;pb=t;}int main(){int a=3,b=4,p1,p2;p1=&a;p2=&b;printf("交换前:a=%d,b=%d\n",a,b);swap(p1,p2);printf("交换后:a=%d,b=%d\n",a,b);}

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