12. Unformatted I/O Example

• Unformatted input means

  1. reading individual characters

  2. discovering data type and format as you read

  
          #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;
          }