C ++无法使用{…}进行初始化

Question

I am using VS2012, and I wanted to include the following map:

#include<iostream>
#include<map>

std::map<int, int> code_map = {
  {65, 97},
  {66, 98},
  {67, 99},
  {68, 100},
  {69, 101},
  {70, 102},  
};

However, the IDE tells me

IntelliSense: Initialization with "{...}" invalid for object of type ""std::map, std::allocator>>""

Does anybody see why this error occurs? I guess that I am using C++11 if I use VS2012, so I thought that would work.

Thank you for the help.

Answer 1

Visual Studio 2012 doesn't support initializer lists. See this for the C++11 features it does support: http://msdn.microsoft.com/en-us/library/vstudio/hh567368%28v=vs.120%29.aspx

Answer 2

Your code is perfectly fine according to C++11 standard.

I remember reading somewhere that Microsoft C++ compiler haven't implemented uniform initialization and initializer lists Visual C++ Compiler November 2012 CTP release. Perhaps you just need to upgrade your compiler.

Answer 3

There are examples to adding a map here:

http://www.cplusplus.com/reference/map/map/map/

I haven't used maps in c++ myself, but from what others have said, Visual Studio is a little slow at adding that functionality.

This link should help you do it the other way.