C ++浮动到const wchar_t *转换函数

Question

I'm converting a float to a const wchar_t *

DisplayText(ConversionUtils::FloatToWstring(fps).c_str()); // Prints garbage

DisplayText(std::to_wstring(fps).c_str()); // Doesn't print anything to the device.

with this function :

std::wstring ConversionUtils::FloatToWstring(float value) {

    return std::to_wstring(value);
}

I want to get something like that :

DisplayText(ConversionUtils::FloatToConstWcharPtr(fps));

Answer 1

Just return by value:

std::wstring ConversionUtils::FloatToWchar(float value) {
    std::string str = std::to_string(value);
    return std::wstring(str.begin(), str.end());
}

Or better, use std::to_wstring() instead.