std::ostringstream str; str << "Hello, " << "world!"; std::string message = str.str();
std::ostringstream str; int num = 5; str.write(reinterpret_castIn this example, a `std::ostringstream` object called `str` is created. An integer `num` is then written to the string stream as a binary string using the `write()` method. The `reinterpret_cast` is used to convert a pointer of type `int*` to `char*`. Finally, the binary string is retrieved as a `std::string` using the `str()` method. Package/Library: The `std::ostringstream` class is part of the C++ Standard Library, which is included with any C++ distribution.(&num), sizeof(num)); std::string binaryString = str.str();