c++ - Qt5环境使用auto类型

Question

auto自动类型推断，用于从初始化表达式中推断出变量的数据类型，我在Qt5下面写的C++代码为什么出错？难道Qt5还不支持C++11？

#include <iostream>
using namespace std;
int main()
{
    auto k=5;
    return 0;
}

错误如下：

C:\Users\Administrator\Desktop\untitled\main.cpp:7: 
错误:'k' does not name a type
     auto k=5;
          ^C:\Users\Administrator\Desktop\untitled\main.cpp:8:
错误:'k' was not declared in this scope
     cout<<k<<endl;
           ^

Answer 1

Add this sentence to your .pro

CONFIG += c++11

Answer 2

I don’t know which QT version of which platform the poster is using. Mine is ok. The environment is QT5.1.1 Mac OS Or the compiler is too old, please install the latest C++ compiler