如何在C ++(C ++ 0x)中使用“自动"? [英] How do i use 'auto' in C++ (C++0x)?

问题描述

我要对这段代码进行什么处理才能使其编译，这绕着这条线刹车:

What do i have to do to this code to make it compile, it's braking around this line:

自动val = what.getObject();

auto val = what.getObject();

#include<iostream>
using namespace std;

class CUP{
    public:
        void whatsHappening(){}
};

class MUG{
    public:
        void whatsHappening(){}
};

class CupThrower{
    public:
        CUP cp;
        CUP getObject(){ return cp;}
};

class MugThrower{
    public:
        MUG mg;
        MUG getObject(){return mg;}
};

template <typename T> void whatsHappening(T what){

    auto val = what.getObject(); //DOES NOT COMPILE
    val.whatsHappening();
}

int main(){
    CupThrower ct;
    MugThrower mt;
    whatsHappening(ct);
    whatsHappening(mt);
    return 0;
}

我正在使用VS2008进行编译.

i am using VS2008 to compile.

推荐答案

自动.使用VS2010和更高版本，或支持此功能的其他编译器.

Auto isn't supported in VS2008. Use VS2010 and later versions, or another compiler supporting this feature.

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