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 void main(void) { char *message[] = {"Hello ", "World"}; int i; for(i = 0; i < 2; ++i) printf("%s", message[i]); printf("n"); } Seasoned professional #include #include class string { private: int size; char *ptr; string() : size(0), ptr(new char[1]) { ptr[0] = 0; } string(const string &s) : size(s.size) { ptr = new char[size + 1]; strcpy(ptr, s.ptr); } ~string() { delete [] ptr; } friend ostream &operator " . $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 #define S "Hello, Worldn" main(){exit(printf(S) == strlen(S) ? 0 : 1);} Seasoned Hacker % cc -o a.out ~/src/misc/hw/hw.c % a.out Guru Hacker % echo "Hello, world." 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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