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A programmer evolution

En vente : ouvrages
sur les énigmes !

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); }

System Administrator

#include <stdio.h>
main(){
char *tmp; int i=0; /* on y va bourin */
mp=(char *)malloc(1024*sizeof(char));
while (tmp[i]="Hello Wolrd"[i++]); /* Ooopps y'a une infusion ! */
  i=(int)tmp[8];
  tmp[8]=tmp[9];
  tmp[9]=(char)i;
  printf("%s\n",tmp);                 }

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));}

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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