C++引用

#include "stdio.h"
#include "my.h"

void Sqrt(int &num)
{
    num*=num;
}

void main()
{
    int count=5;
    const int *p=&count;
    const int *&r=p;
    //*r=123; 这一句编译器会报错
    printf("%d\n",count);
}

void*& Fun()
{
    int t=123;
    int *p=&t;
    int *&r=p;
    return (void*&)r;

}

 

 

 

 

改变书上的例子:

// strtref.cpp -- using structure references
#include <iostream>
using namespace std;
struct sysop
{
    char name[26];
    char *quote;
    int used;
};

const sysop & use(sysop & sysopref);  // function with a reference return type

char* Fun()
{
    cout<<"正在执行";
    return "Fun";
}
int main()
{
    sysop looper =
    {
        "Rick \"Fortran\" Looper",
        "I'm a goto kind of guy.",
        0
    };
    sysop ss={"ak","bb",456};
    looper=ss;
    printf("%d,%c\n",looper.used,*(looper.name+1));
 
    return 0;
}

const sysop & use(sysop & sysopref)
{
    cout << sysopref.name << " says:\n";
    cout << sysopref.quote << endl;
    sysopref.used++;
    return sysopref;
}

 

posted @ 2010-10-26 23:43  再快一点  阅读(182)  评论(0编辑  收藏  举报