那个朋友还能帮我看看这段程序那里有问题的啊！

[rfuture]

#include<iostream.h>

void swap(char& str1,char& str2)
{
char temp;
temp=str1;
str1=str2;
str2=temp;
}

void main()
{
char * ap="hello";
char * bp="how are you?";

cout<<"ap: "<<ap<<endl;
cout<<"bp: "<<bp<<endl;
swap(ap,bp);
cout<<"ap: "<<ap<<endl;
cout<<"bp: "<<bp<<endl;
}

[liem]

void swap(char** a,char **b)
{
char *t=*a;
*a=*b;
*b=t;
}

调用：
swap(&ap,&bp);

[蝎子i软件]

#include<iostream.h>
using namespace std;

void swap(char *&str1,char *&str2) //here
{
char *temp; //here
temp=str1;
str1=str2;
str2=temp;
}

void main()
{
char * ap="hello";
char * bp="how are you?";

cout<<"ap: "<<ap<<endl;
cout<<"bp: "<<bp<<endl;
swap(ap,bp);
cout<<"ap: "<<ap<<endl;
cout<<"bp: "<<bp<<endl;
}