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PROGRAM sumint;
 
{ SUMINT.PAS returns the sum of its integer parameters. It illustrates
  the following routines:
 
      ParamCount    ParamStr    Val
}
 
CONST
    program_name = 'SUMINT ';
    program_desc = ' prints the sum of its integer parameters.';
 
VAR
    count  : Word;
    lint   : LongInt;
    sum    : LongInt;
    status : Integer;
 
BEGIN
 
    Writeln( program_name, program_desc );
    Writeln;
 
    sum := 0;
    FOR count := 1 TO ParamCount DO
        BEGIN
        Val( ParamStr( count ), lint, status );
        IF (status <> 0) THEN
            Writeln( 'Character ',status, ' in parameter ', count,
                     ' invalid.' )
        ELSE sum := sum + lint;
        END;
 
    Writeln( 'The sum of the valid parameters is ', sum, '.' );
 
END.