Numeric Conversions

You can convert with std::to_string(val) and std::to_wstring(val) numbers or floating point numbers to the corresponding std::string or std::wstring. For the opposite direction for the numbers or floating point numbers, you have the function family of the sto* functions. All functions need the header <string>.

Read sto* as string to

The seven ways to convert a string into a natural or floating point number follow a simple pattern. All functions start with sto and add further characters, denoting the type to which the strings should be converted to. E.g. stol stands for string to long or stod for string to double.

The sto functions all have the same interface. The example shows it for the type long.

std::stol(str, idx= nullptr, base= 10)

The function takes a string and determines the long representation to the base base. stol ignores leading spaces and optionally returns the index of the first invalid character in idx. By default...