问题描述

我正在制作一个小词汇记忆程序，其中单词会随机闪现给我以获取含义.我想使用 Bjarne Stroustroup 告诉我们的标准 C++ 库，但我一开始就遇到了一个看似奇怪的问题.

I am making a small vocabulary remembering program where words would would be flashed at me randomly for meanings. I want to use standard C++ library as Bjarne Stroustroup tells us, but I have encountered a seemingly strange problem right out of the gate.

我想将 long 整数更改为 std::string 以便能够将其存储在文件中.我已经使用 to_string() 做同样的事情.问题是，当我用 g++(版本 4.7.0，如其 --‍version 标志中提到的)编译它时，它说:

I want to change a long integer into std::string so as to be able to store it in a file. I have employed to_string() for the same. The problem is, when I compile it with g++ (version 4.7.0 as mentioned in its --‍version flag), it says:

PS C:UsersAnuragSkyDriveCollegePrograms> g++ -std=c++0x ttd.cpp
ttd.cpp: In function 'int main()':
ttd.cpp:11:2: error: 'to_string' is not a member of 'std'

出现此错误的程序是:

#include <string>

int main()
{
    std::to_string(0);
    return 0;
}

但是，我知道这不可能，因为 msdn 库明确说明 它存在并且一个较早的问题关于堆栈溢出(对于 g++ 4.5 版)说它可以使用 -std=c++0x 标志打开.我做错了什么?

But, I know it can't be because msdn library clearly says it exists and an earlier question on Stack Overflow (for g++ version 4.5) says that it can be turned on with the -std=c++0x flag. What am I doing wrong?

推荐答案

这是 MinGW 下的已知错误.相关 Bugzilla.在评论部分，您可以获得 patch 以使其与 MinGW 配合使用.

This is a known bug under MinGW. Relevant Bugzilla. In the comments section you can get a patch to make it work with MinGW.

此问题已在 MinGW-w64 提供的高于 GCC 4.8.0 的 MinGW-w64 发行版中得到修复项目.尽管名称如此，但该项目提供了 32 位和 64 位的工具链.Nuwen MinGW 发行版 也解决了这个问题.

This issue has been fixed in MinGW-w64 distros higher than GCC 4.8.0 provided by the MinGW-w64 project. Despite the name, the project provides toolchains for 32-bit along with 64-bit. The Nuwen MinGW distro also solves this issue.

这篇关于g++ (mingw) 说 to_string 不是 std 的成员的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持编程学习网！