C++引用

最新推荐文章于 2025-09-13 19:30:09 发布

转载最新推荐文章于 2025-09-13 19:30:09 发布 · 48 阅读

0 ·

CC 4.0 BY-SA版权

原文链接：http://www.cnblogs.com/mxw09/archive/2010/10/26/1862010.html

文章标签：

#c/c++

#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;
}