在C ++中将双精度转换为字符串 [英] Converting Double to String in C++

问题描述

Hi guys
我有一些问题，试图将双转换为C ++字符串。这是我的代码

Hi guys I am having some issues trying to convert a double to C++ string. Here is my code

std::string doubleToString(double val)
{
    std::ostringstream out;
    out << val;
    return out.str();
}

我遇到的问题是如果double传递为'10000000' 。然后返回的字符串值是1e + 007

The problem I have is if a double is being passed in as '10000000'. Then the string value being returned is 1e+007

如何获得字符串值为10000000

How can i get the string value as "10000000"

推荐答案

#include <iomanip>
using namespace std;
// ...
out << fixed << val;
// ...

您也可以考虑使用 setprecision 设置小数位数：

You might also consider using setprecision to set the number of decimal digits:

out << fixed << setprecision(2) << val;

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