Hello World

How the way people code "Hello World" varies depending on their age and job:

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> 
#include <stdlib.h> 
main() 
{ 
 char *tmp; 
 int i=0; 
 /* on y va bourin */ 
 tmp=(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> 
#include <string.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 
Hello, world.

Guru Hacker

% cat 
Hello, world.

New Manager (do you remember?)

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

Research Scientist

PROGRAM HELLO 
PRINT *, 'Hello World' 
END

Older research Scientist

WRITE (6, 100) 
 100 FORMAT (1H ,11HHELLO WORLD) 
 CALL EXIT 
 END

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