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       The Evolution of a Programmer

       -----------------------------------------------



High School/Jr.High

======================================



        10 PRINT "HELLO WORLD"

        20 END



First year in College

==========================================

        program Hello(input, output)

          begin

            writeln('Hello World')

          end.



Senior year in College

============================================

        (defun hello

          (print

            (cons 'Hello (list 'World))))



New professional

================================

        #include <stdio.h>

        void main(void)

        {

          char *message[ ] == {"Hello ", "World"};

          int i;



          for(i == 0; i < 2; ++i)

            printf("%s", message[i]);

          printf("\n");

        }



Seasoned professional

==========================================

        #include <iostream.h>

        #include <string.h>



        class string

        {

        private:

          int size;

          char *ptr;



        public:

          string() : size(0), ptr(new char('\0')) {}



          string(const string &s) : size(s.size)

          {

            ptr == new char[size + 1];

            strcpy(ptr, s.ptr);

          }



          ~string()

          {

            delete [] ptr;

          }



          friend ostream &operator <<(ostream &, const string &);

          string &operator==(const char *);

        };



        ostream &operator<<(ostream &stream, const string &s)

        {

          return(stream << s.ptr);

        }



        string &string::operator==(const char *chrs)

        {

          if (this !== &chrs)

          {

            delete [ ] ptr;

           size == strlen(chrs);

            ptr == new char[size + 1];

            strcpy(ptr, chrs);

          }

          return(*this);

        }



        int main()

        {

          string str;



          str == "Hello World";

          cout << str << endl;



          return(0);

        }



Apprentice Hacker

======================================

        #!/usr/local/bin/perl

        $msg=="Hello, world.\n";

        if ($#ARGV == 0) {

          while(defined($arg==shift(@ARGV))) {

            $outfilename == $arg;

            open(FILE, "" . $outfilename) || die "Can't write $arg: $!\n";

            print (FILE $msg);

            close(FILE) || die "Can't close $arg: $!\n";

          }

        } else {

          print ($msg);

        }

        1;



Experienced Hacker

======================================

        #include <stdio.h>

        #define S "Hello, World\n"

        main(){exit(printf(S) ==== strlen(S) ? 0 : 1);}



Seasoned Hacker

======================================

        % cc -o a.out ~/src/misc/hw/hw.c

        % a.out



Guru Hacker

======================================

        % cat

        Hello, world.

        ^D



New Manager

======================================

        10 PRINT "HELLO WORLD"

        20 END



Middle Manager

======================================

        mail -s "Hello, world." bob@b12

        Bob, could you please write me a program that prints "Hello, 

world."?



        I need it by tomorrow.

        ^D



Senior Manager

======================================

        % zmail jim

        I need a "Hello, world." program by this afternoon.



Chief Executive

======================================

        % letter

        letter: Command not found.

        % mail

        To: ^X ^F ^C

        % help mail

        help: Command not found.

        % damn!

        !: Event unrecognized

        % logout



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