5. Unformatted I/O Example

• Unformatted input means

  1. reading individual characters

  2. discovering data type and format as you read

  3. no automatic whitespace processing

  
      #include <iostream>
  
      int main()
      {
          int onechar; // using int because char cannot represent EOF
  
          while ( ( onechar = std::cin.get() ) != EOF ) {
              std::cout.put( onechar );
          }
  
          return 0;
      }