unable to find numeric literal operator 'operator""s

这个错误通常是因为您正在使用的编译器不支持 C++14 引入的标准库字符串字面量操作符。这个操作符允许您使用像 `"hello"s` 这样的字符串字面量创建 std::string 对象，而不需要手动调用构造函数。如果您的编译器不支持这个操作符，请尝试使用传统的 std::string 构造函数，例如 `std::string("hello")`。另外，也可以尝试升级您的编译器版本，以获得更好的 C++14 支持。

相关问题

unable to find numeric literal operator ‘operator""n’

This error message typically occurs when you are trying to use the C++11 user-defined literal operator "operator""n" in your code, but your compiler does not support it.

To resolve this error, you can try updating your compiler to a version that supports C++11 features, or you can avoid using the "operator""n" literal suffix in your code. Alternatively, you can define your own user-defined literal operator that provides the same functionality as "operator""n".

16 15 C:\Users\86137\Desktop\未命??.cpp [Error] unable to find numeric literal operator 'operator""m'

This error message indicates that the compiler is unable to find a user-defined numeric literal operator for the 'm' suffix. This operator is typically used to define custom units of measure in C++ programs.

To resolve this error, you may need to define a numeric literal operator for the 'm' suffix in your code. This can be done using the following syntax:

constexpr long double operator"" m(long double value) {
    return value * 1000.0; // convert meters to millimeters
}

In this example, the operator converts a value in meters to millimeters. You can modify the implementation of the operator to suit your specific needs.

Once you have defined the operator, you should be able to use the 'm' suffix in your code without encountering the error message.