c++ 整数->std::string 转换.简单的功能?

2022-01-14 00:00:00 integer c++ stdstring

问题:我有一个整数；这个整数需要转换为 stl::string 类型.

Problem: I have an integer; this integer needs to be converted to a stl::string type.

过去，我使用 stringstream 进行转换，这有点麻烦.我知道 C 方法是执行 sprintf，但我更愿意执行类型安全的 C++ 方法.

In the past, I've used stringstream to do a conversion, and that's just kind of cumbersome. I know the C way is to do a sprintf, but I'd much rather do a C++ method that is typesafe(er).

有没有更好的方法来做到这一点?

Is there a better way to do this?

这是我过去使用的字符串流方法:

Here is the stringstream approach I have used in the past:

std::string intToString(int i)
{
    std::stringstream ss;
    std::string s;
    ss << i;
    s = ss.str();

    return s;
}

当然，这可以改写成这样:

Of course, this could be rewritten as so:

template<class T>
std::string t_to_string(T i)
{
    std::stringstream ss;
    std::string s;
    ss << i;
    s = ss.str();

    return s;
}

但是，我认为这是一个相当重量级"的实现.

However, I have the notion that this is a fairly 'heavy-weight' implementation.

Zan 注意到调用非常好，但是:

Zan noted that the invocation is pretty nice, however:

std::string s = t_to_string(my_integer);

无论如何，更好的方法是......很好.

At any rate, a nicer way would be... nice.

itoa() 的替代方法，用于将整数转换为字符串 C++?

推荐答案

现在在 c++11 中我们有了

Now in c++11 we have

#include <string>
string s = std::to_string(123);

参考链接:http://en.cppreference.com/w/cpp/string/basic_string/to_string

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