c 2b 2b first letter of string

1#include <iostream>
2#include <string>
3
4int main() 
5{
6  string str{};     // creating string
7  getline(cin, str);// using getline for user input
8  std::cout << str; // output string namePerson
9  if (str[0] >= 'a' || str[0] <= 'z')
10    str[0] -= 32;
11  return (0);
12}

1// string::at
2#include <iostream>
3#include <string>
4
5int main ()
6{
7  std::string str ("Test string");
8  for (unsigned i=0; i<str.length(); ++i)
9  {
10    std::cout << str.at(i);
11  }
12  return 0;
13}