[特别推荐]编程老鸟、黑客与CEO的进化阶段
一般来说, 一个软件工程师将按如下几个阶段成长下去:
*****中学阶段*****--------------------------------------
10 PRINT "HELLO WORLD"
20 END
*****大学一年级*****--------------------------------------
program Hello(input, output)
begin
writeln('Hello World')
end.
*****大学高年级*****--------------------------------------
(defun hello
(print
(cons 'Hello (list 'World))))
*****初级程序员*****--------------------------------------
#include
void main(void)
{
char *message[] = {"Hello ", "World"};
int i;
for(i = 0; i < 2; ++i)
printf("%s", message[i]);
printf("\n");
}
*****编程老鸟*****--------------------------------------
#include
#include
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);
}
*****黑客初阶*****--------------------------------------
#!/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;
*****黑客有成*****--------------------------------------
#include
#define S "Hello, World\n"
main()
{exit(printf(S) == strlen(S) ? 0 : 1);}
*****黑客高手*****--------------------------------------
% cc -o a.out ~/src/misc/hw/hw.c
% a.out
*****黑客大虾*****--------------------------------------
% cat
Hello, world.
^D
*****项目组长*****--------------------------------------
10 PRINT "HELLO WORLD"
20 END
*****部门经理*****--------------------------------------
mail -s "Hello, world." bob@b12
Bob, could you please write me a program that prints "Hello, world."?
I need it by tomorrow.
^D
*****高级经理*****--------------------------------------
% zmail jim
I need a "Hello, world." program by this afternoon.
*****首席执行官*****--------------------------------------
% letter
letter: Command not found.
% mail
To: ^X ^F ^C
% help mail
help: Command not found.
% 他妈的!
!: Event unrecognized
% logout