“Hello, World!”程序是一个只在计算机屏幕上打印出“Hello, World!”(英语,意为“世界,你好!”)字串的计算机程序。该程序通常是计算机程序设计语言的初学者所要学习编写的第一个程序。它还可以用来确定该语言的编译器、程序开发环境以及运行环境已经正确安装。 $(%t^8{a~G
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将Hello World程序作为第一个学写的程序,现在已经成为一种传统。该程序最早出现在由Brian Kernighan和Dennis Ritchie写的计算机程序设计教程《C语言程序设计》。 ;rH@>VrR
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以下是用不同语言写成的Hello World程序的几个例子: *,DBRJ_*7
Ada !b+Kasss9
with Ada.Text_Io; use Ada.Text_Io; D<cHa |
procedure Hello is V]9?9-r
begin 3bPvL/\Lb
Put_Line ("Hello, world!"); 'H,l\i@"
end Hello; K<+h/Ok
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汇编语言 Nm=W?i
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x86 CPU,DOS,TASM ,!4(B1@
MODEL SMALL /fc@=CO
IDEAL ,Z I"+v
STACK 100H "GofQ5,|
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DATASEG re/l5v,|3
HW DB 'Hello, world!$' Z`b{r;`m8
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CODESEG p( Q5!3C0q
MOV AX, @data %/&?t`%H
MOV DS, AX &6L{1
MOV DX, OFFSET HW r 6STc,%5
MOV AH, 09H +d736lLe%
INT 21H Sc*O_c3D
MOV AX, 4C00H Rj=xn(@d
INT 21H qzqv-{.h
END &u_f:Pog
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x86 CPU,GNU/Linux,NASM L[*Xrp;/&
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). y85/qg)H^
;Enter this into "hello.asm" then type: 7=8e|$K_
;"nasm -f elf hello.asm" ]f q.r
;"ld hello.o -o hello" j{9sn,<:
;"./hello" xAD: Z"
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section .data ;data section declaration v7/qJ9l
msg db 'Hello World!',0AH e? fFh,a
len equ $-msg ;string length ;,]T|>M
GV([gs
section .text ;code section declaration 7PZ0
global _start ;entry point (start of execution) [x5T7=
_start: mov edx,len ;string length T)]5k3{
mov ecx,msg ;string start b{t'Doe
mov ebx,1 ;file handle: stdout a<M<) {$u
mov eax,4 ;sys_write .4~n|d>z
int 80h ;kernel system call A|8(3PiP
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mov ebx,0 ;return value 0p_/eWww-
mov eax,1 ;sys_exit ,\f!e#d
int 80h ;kernel system call Z!m0nx
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V 3-5:z
x86 CPU,Windows,MASM32 =LS?:Mhm
.386 A5zT^!`[
.model flat,stdcall 0*q&)
option casemap:none A -G?@U
;Include 文件定义 ZUb6d*B
include windows.inc jnX9] PkJ
include user32.inc Qj?FUxw
includelib user32.lib wz5xJ:T j
include kernel32.inc l-"$a8jn2
includelib kernel32.lib E[>4b7{g:
;数据段 ewSFB <
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.data T"XP`gk
szCaption db 'A MessageBox!',0 G_g~-[O
szText db 'Hello,world!',0 J
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;代码段 auqM>yx
.code ao<@a{G
start: BM#cosV7%h
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK "8aw=3A
invoke ExitProcess,NULL iNgHx[*?
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> z{cI G8z
end start =usx' #rb
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BEGIN { print "Hello, world!" } 2Tt@2h_L
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BASIC _H|x6X1-
传统版BASIC(例如GWBASIC): `AeId/A4n
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10 PRINT "Hello, world!" _K>cB<+d
20 END !dYkvoQNn
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或在提示符输入: [ XjJsk,
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?"Hello, world!":END MVK='
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现代版BASIC(例如Quick BASIC): dy;Ue5
C ".&m
Print "Hello, world!" IM}T2\tZ}
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以下的语句在Quick BASIC中同样有效: qC40/1-m8K
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? "Hello,world!" B0NKav
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BCPL 'H<?K
GET "LIBHDR" i2A>T/?{
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LET START () BE 0~Ot
$( K_',Gd4L
WRITES ("Hello, world!*N") s={AdQ
$) $%"i|KTsv:
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Befunge Id(o6j^J_
"!dlrow olleH">v ~T9%%W[
, ?N<* ATCL
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C x'@0]f.
#include <stdio.h> X90VJb]
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int main(void) Lnbbv
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{ \:]Clvc
printf("Hello, world!\n"); VG^*?62
return 0; q3adhY9|)0
} oE[wOq+
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C++ F]\(p=U.
#include <iostream> jt?4raNW
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int main() XYhN;U}Z
{ 'Ar+k\.J
std::cout << "Hello, world!" << std::endl; `@q[&^
return 0; I?LJXo \O
} Nl,M9
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C++/CLI i,1=5@rw5
int main() J^8(h R
{ Y
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System::Console::WriteLine("Hello, world!"); 5drc8_fZ
} Ppi/`X
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C# (C Sharp) `&2~\o/
class HelloWorldApp NFw7g&1;Kp
{ PnkJWl<S
public static void Main() &NZl_7PL
{ ;[TC`DuNj0
System.Console.WriteLine("Hello, world!"); 8}z]B^?Fy
} <qjNX-|
} 6t/nM
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COBOL C4wJSQl_I
IDENTIFICATION DIVISION. ya7PF~:E-
PROGRAM-ID. HELLO-WORLD. &<hDl<E
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ENVIRONMENT DIVISION. vFKX@wV S
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DATA DIVISION. 4g<F."
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PROCEDURE DIVISION. C_xOk'091
DISPLAY "Hello, world!". ,ab_u@
STOP RUN. ev~/Hf
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${I$@qq83
Common Lisp 0kC}qru'
(format t "Hello world!~%") b{Srd3
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DOS批处理 K5l#dl_T
@echo off 4Uz1~AuNxb
echo "Hello, world!" FyD^\6/x
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Eiffel :eIPPh|\
class HELLO_WORLD j{}-zQ]n
w&&uk[Gh/a
creation WZ}je!82
make P(iZGOKUs=
feature 9gjI;*(z1
make is X( Q*(_
local fpMnA
io:BASIC_IO 2hB';Dv
do IX/FKSuq
!!io H<tk/\C
io.put_string("%N Hello, world!") Y)D~@|D,
end -- make VrG4wLpLs
end -- class HELLO_WORLD #bRr|`
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