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- 1970-1-1
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我们刚开始接触计算机语言大多从Hello world 开始,下面演示各种语言的Hello world program:
AKA 控制台
ABC
WHILE (1=1) :
WRITE "Hello World "
Ada
with Ada.Text_Io; use Ada.Text_Io;
procedure Hello is
begin
Put_Line ("Hello, world!");
end Hello;
AmigaE
PROC main()
WriteF('Hello, World!')
ENDPROC
APL
'Hello World'
Assembly language
Accumulator-only architecture: DEC PDP-8, PAL-III assembler
See the Example section of the PDP-8 article.
Accumulator + index register machine: MOS 6502, CBM, ca65 asm
MSG: .ASCIIZ "Hello, world!"
LDX #0
LDA MSG,X ; load initial char
@LP: JSR $FFD2 ; CHROUT CBM KERNAL
INX
LDA MSG,X
BNE @LP
RTS
Accumulator/Index microcoded machine: Data General Nova, RDOS
See the example section of the Nova article.
Expanded accumulator machine: Intel x86, MS-DOS, TASM
MODEL SMALL
IDEAL
STACK 100H
DATASEG
MSG DB 'Hello, world!$'
CODESEG
MOV AX, @data
MOV DS, AX
MOV DX, OFFSET MSG
MOV AH, 09H ; DOS: output ASCII$ string
INT 21H
MOV AX, 4C00H
INT 21H
END
General-purpose-register CISC: DEC PDP-11, RT-11, MACRO-11
.MCALL .REGDEF,.TTYOUT,.EXIT
.REGDEF
HELL MOV #MSG,R1
MOVB (R1),R0
LOOP: .TTYOUT
MOVB +(R1),R0
BNE LOOP
.EXIT
MSG: .ASCIZ /HELLO, WORLD!/
.END HELLO
CISC: VAX, VMS, MACRO32
.title hello
term_name: .ascid /SYS$INPUT/
term_chan: .blkw 1
out_iosb: .blkq 1
msg: .asciz /Hello, world!/
.entry start,0
; establish a channel for terminal I/O
$assign_s devnam=term_name,-
chan=term_chan
blbc r0,error
; queue the I/O request
$qio_s chan=term_chan,-
func=#io$_writevblk,-
iosb=out_iosb,-
p1=msg,-
p2=#13
blbc r0,error
$exit_s ; normal exit
error: halt ; error condition
.end start
AWK
BEGIN { print "Hello, world!" }
BASIC MS BASIC (traditional, unstructured)
10 PRINT "Hello, world!"
20 END
TI-BASIC
isp "Hello, world!"
Structured BASIC
print "Hello, world!"
BCPL
GET "LIBHDR"
LET START () BE
$(
WRITES ("Hello, world!*N")
$)
C
#include
int main(void) {
printf("Hello, world!\n");
return 0;
}
C++
#include
using namespace std;
int main() {
cout << "Hello, world!" << endl;
return 0;
}
C#
class HelloWorldApp {
public static void Main() {
System.Console.WriteLine("Hello, world!");
}
}
Clean
module hello
Start :: String
Start = "Hello, world"
CLIST
PROC 0
WRITE Hello, World!
COBOL
IDENTIFICATION DIVISION.
PROGRAM-ID. HELLO-WORLD.
ENVIRONMENT DIVISION.
DATA DIVISION.
PROCEDURE DIVISION.
DISPLAY "Hello, world!".
STOP RUN.
Common Lisp
(format t "Hello world!~%")
Eiffel
class HELLO_WORLD
creation
make
feature
make is
local
iBASIC_IO
do
!!io
io.put_string("%N Hello, world!")
end -- make
end -- class HELLO_WORLD
Erlang
-module(hello).
-export([hello_world/0]).
hello_world() -> ifwrite("Hello, world!\n").
Forth
." Hello, world!" CR
Fortran (偶大学学的课程)
PROGRAM HELLO
WRITE(*,10)
10 FORMAT('Hello, world!')
STOP
END
Haskell
module HelloWorld (main) where
main = putStr "Hello World\n"
Iptscrae
ON ENTER {
"Hello, " "World!" & SAY
}
Java
public class Hello {
public static void main(String[] args) {
System.out.println("Hello, world!");
}
}
Logo
print [hello world!]
Lua
print "Hello, world!"
MIXAL
TERM EQU 19 the MIX console device number
ORIG 1000 start address
START OUT MSG(TERM) output data at address MSG
HLT halt execution
MSG ALF "MIXAL"
ALF " HELL"
ALF "O WOR"
ALF "LD "
END START end of the program
MSDOS batch
@echo off
echo Hello, world!
OCaml
let _ =
print_endline "Hello world!";;
OPL
PROC hell
PRINT "Hello, World"
ENDP
Pascal
program Hello;
begin
writeln('Hello, world!');
end.
Perl
print "Hello, world!\n";
PHP
Pike
#!/usr/local/bin/pike
int main() {
write("Hello, world!\n");
return 0;
}
PL/I
Test: procedure options(main);
declare My_String char(20) varying initialize('Hello, world!');
put skip list(My_String);
end Test;
Python
print "Hello, world!"
REXX, also NetRexx and Object REXX
say "Hello, world!"
Ruby
print "Hello, world!\n"
Sather
class HELLO_WORLD is
main is
#OUT+"Hello World\n";
end;
end;
Scheme
(display "Hello, world!")
(newline)
sed (requires at least one line of input)
sed -ne '1s/.*/Hello, world!/p'
Self
'Hello, World!' uppercase print.
Smalltalk
Transcript show: 'Hello, world!'
SML
print "Hello, world!\n";
SNOBOL
OUTPUT = "Hello, world!"
END
SQL
create table MESSAGE (TEXT char(15));
insert into MESSAGE (TEXT) values ('Hello, world!');
select TEXT from MESSAGE;
drop table MESSAGE;
Or, more simply
print 'Hello, World.'
StarOffice Basic
sub main
print "Hello, World"
end sub
Tcl
puts "Hello, world!"
Turing
put "Hello, world!"
UNIX-style shell
echo 'Hello, world!'
Romanian pseudocode (UBB Cluj-Napoca)
Algoritmul Salut este:
fie s:="Hello, world";
tipareste s;
sf-Salut
传统图形界面应用开发工具
C++ bindings for GTK graphics toolkit
#include
#include
#include
#include
using namespace std;
class HelloWorld : public Gtk::Window {
public:
HelloWorld();
virtual ~HelloWorld();
protected:
Gtk::Button m_button;
virtual void on_button_clicked();
};
HelloWorld::HelloWorld()
: m_button("Hello, world!") {
set_border_width(10);
m_button.signal_clicked().connect(SigC:lot(*this,
&HelloWorld: n_button_clicked));
add(m_button);
m_button.show();
}
HelloWorld::~HelloWorld() {}
void HelloWorld: n_button_clicked() {
cout << "Hello, world!" << endl;
}
int main (int argc, char *argv[]) {
Gtk::Main kit(argc, argv);
HelloWorld helloworld;
Gtk::Main::run(helloworld);
return 0;
}
Java
import java.awt.*;
import java.awt.event.*;
public class HelloFrame extends Frame {
HelloFrame(String title) {
super(title);
}
public void paint(Graphics g) {
super.paint;
java.awt.Insets ins = this.getInsets();
g.drawString("Hello, world!", ins.left + 25, ins.top + 25);
}
public static void main(String args [])
{
HelloFrame fr = new HelloFrame("Hello");
fr.addWindowListener(
new WindowAdapter() {
public void windowClosing(WindowEvent e)
{
System.exit( 0 );
}
}
);
fr.setResizable(true);
fr.setSize(500, 100);
fr.setVisible(true);
}
}
Qt toolkit (in C++)
#include
#include
#include
#include
class HelloWorld : public QWidget
{
Q_OBJECT
public:
HelloWorld();
virtual ~HelloWorld();
public slots:
void handleButtonClicked();
QPushButton *mPushButton;
};
HelloWorld::HelloWorld() :
QWidget(),
mPushButton(new QPushButton("Hello, World!", this))
{
connect(mPushButton, SIGNAL(clicked()), this, SLOT(handleButtonClicked()));
}
HelloWorld::~HelloWorld() {}
void HelloWorld::handleButtonClicked()
{
std::cout << "Hello, World!" << std::endl;
}
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
HelloWorld helloWorld;
app.setMainWidget(&helloWorld);
helloWorld.show();
return app.exec();
}
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