Modern C++: Efficient and Scalable Application Development

How to do it...

Use the following standard conversion functions when you need to convert between numbers and strings:

• To convert from an integer or floating point type to a string type, use std::to_string() or std::to_wstring() as shown in the following code snippet:

        auto si = std::to_string(42);      // si="42"         auto sl = std::to_string(42l);     // sl="42"         auto su = std::to_string(42u);     // su="42"         auto sd = std::to_wstring(42.0);   // sd=L"42.000000"         auto sld = std::to_wstring(42.0l); // sld=L"42.000000"

• To convert from a string type to an integer type, use std::stoi(), std::stol(), std::stoll(), std::stoul(), or std::stoull(); refer to the following code snippet:

        auto i1 = std::stoi("42");                 // i1 = 42  auto i2 = std::stoi("101010", nullptr, ...