Conversion to Lowercase

1. Design a function
   void ToLower(char* s)
   which will convert the characters in the input argument from uppercase to lowercase.
2. Test your function with the following main program:

   
   int main()
   {
       char buffer[80];
       cout << "Please input a word -- ";
       cin >> buffer;
       ToLower(buffer);
       cout << buffer << endl;
       return 0;
   }