转自豆瓣

不同年龄职业的人所写的Hello World程序
高中（BASIC）
10 PRINT "HELLO WORLD"
20 END
大一（PASCAL）
program Hello(input, output)
begin
writeln('Hello World')
end.
大二以后（LISP）
(defun hello
(print
(cons 'Hello (list 'World))))
职场新人（C）
#include <stdio.h>
void main(void)
{
char *message[] = {"Hello ", "World"};
int i;
for(i = 0; i < 2; ++i)
printf("%s", message[i]);
printf("\n");
}
职场老手（C++）
#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);
}

学徒黑客（Perl）
#!/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;

这贴被吞的差不多了。百度是想怎样啊。

度娘心情不好

echo "Hello World!"

目测....我在职场新人阶段，至少程序是这样的。哈哈！

哇~~~我写那个就几句就完了~~~嘎嘎~~哪还用啥for喔~~~