Function reverse

Exercises/Modules/Chapter 08/Soln8_02.cpp:30–40

Reverse a string in place The code here is working with a copy of the argument so the original is not affected.

// The code here is working with a copy of the argument
// so the original is not affected.
std::string reverse(std::string str)
{
  const size_t length {str.length()};
  for (size_t i {}; i < length / 2; ++i)
  {
    char temp = str[i];
    str[i] = str[length - i - 1];
    str[length - i - 1] = temp;
  }
  return str;
}