// Soln4_3.cpp
  include <iostream>
  include <string>
  using std::cout;
  using std::endl;
  
  int main()
  {
     char str[] = "Doctor Livingstone, I presume?";
     cout << str << endl;                     // Output the string
  
     for (unsigned int i = 0; i < strlen(str); i += 2)
     {
        if (str[i] >= 'a' && str[i] <= 'z')   // If it's lowercase letter
           str[i] -= 32;                      // change to uppercase
     }
  
     cout << str << endl;                     // Output the modified string
     return 0;
  }