引用参数理解

1.值传递

  main 方法:    

int main(){
         int dev=333;
    int &ReNameDev=dev;
    cout<<"输出:dev="<<dev<<"\n";
    cout<<"输出:ReNameDev="<<ReNameDev<<"\n";
    ReNameDev=999;
    cout<<"直接修改引用值以后:dev="<<dev<<"\n";
    cout<<"直接修改引用值以后:ReNameDev="<<ReNameDev<<"\n";
    Modify(ReNameDev);
    cout<<"Modify(ReNameDev)->dev="<<dev<<"\n";
    cout<<"Modify(ReNameDev)->ReNameDev="<<ReNameDev<<"\n";
}

 void Modify(int item):

  

void Modify(int item){
    item=100000;
}

执行结果:

 

2.引用地址?

当方法Modify 修改为:

//引用参数
void Modify(int& item){
    item=100000;
}

输出结果:

posted @ 2012-08-01 11:03  流浪者的飘  阅读(250)  评论(0编辑  收藏  举报