--- Module:   ex.cpp
                              _
   #define Extract(ch) (ch) & 0xFf
ex.cpp (5) : Info 773: Expression-like macro 'Extract' not parenthesized
                          _
      f = fopen( fn, "r" );
ex.cpp (16) : Warning 668: Possibly passing a null pointer to function
    'fopen(const char *, const char *)', arg. no. 1 [Reference: file ex.cpp:
    line 15]
                                 _
      (void) fgets( buf, 101, f );
ex.cpp (17) : Warning 668: Possibly passing a null pointer to function
    'fgets(char *, int, FILE *)', arg. no. 3 [Reference: file ex.cpp: line 16]
ex.cpp (17) : Warning 419: Apparent data overrun for function 'fgets(char *,
    int, FILE *)', argument 2 (size=101) exceeds argument 1 (size=100)
    [Reference: file ex.cpp: line 17]
                 _
      fclose( f );
ex.cpp (18) : Warning 668: Possibly passing a null pointer to function
    'fclose(FILE *)', arg. no. 1 [Reference: file ex.cpp: line 16]
      _
      }
ex.cpp (19) : Info 818: Pointer parameter 'fn' (line 10) could be declared as
    pointing to const 
                                         _
          sum = sum + Value(Extract(*s++));
ex.cpp (25) : Warning 666: Expression with side effects passed to repeated
    parameter 1 in macro 'Value' 
                            _
      return Abs( sum - 100 );
ex.cpp (26) : Warning 665: Unparenthesized parameter 1 in macro 'Abs' is passed
    an expression 
      _
      }
ex.cpp (27) : Info 818: Pointer parameter 's' (line 21) could be declared as
    pointing to const 
          _
          }
ex.cpp (43) : Info 818: Pointer parameter 's' (line 35) could be declared as
    pointing to const
ex.cpp (43) : Warning 1541: Member 'String::a' (line 32) possibly not
    initialized by constructor
ex.cpp (43) : Warning 1541: Member 'String::len' (line 33) possibly not
    initialized by constructor 
                           _
      ~String() { len = 0; }
ex.cpp (44) : Warning 1540: Pointer member 'String::a' (line 32) neither freed
    nor zero'ed by destructor 
                           _
          a = new char[len];
ex.cpp (49) : Warning 423: Creation of memory leak in assignment to 'String::a' 
                  _
          return s;
ex.cpp (51) : Info 1772: Assignment operator 'String::operator=(const String
    &)' is not returning *this
ex.cpp (51) : Warning 1561: Reference initialization causes loss of
    const/volatile integrity (return) 
          _
          }
ex.cpp (52) : Warning 1529: Symbol 'String::operator=(const String &)' not
    first checking for assignment to this

    --- Wrap-up for Module: ex.cpp

Info 753: local class 'String' (line 29, file ex.cpp) not referenced
Info 754: local structure member 'String::String(const String &)' (line 45,
    file ex.cpp) not referenced
Info 766: Header file 'c:\ansi\stdlib.h' not used in module 'ex.cpp'