Answers for "change case of string in c++"

c++ switch string

switch(str2int("my string"))
{
  case str2int("my string")):
    {
    }
    break;
}

constexpr unsigned int str2int(const char* str, int h = 0)
{
    return !str[h] ? 5381 : (str2int(str, h+1) * 33) ^ str[h];
}

string to upper c++

std::string data = "This is a sample string.";
// convert string to upper case
std::for_each(data.begin(), data.end(), [](char & c){
c = ::toupper(c);
});