“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。 i z%wozf
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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》。 E< Y!BT[X
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以下是用不同语言写成的Hello World程序的几个例子: ^V7'S<
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with Ada.Text_Io; use Ada.Text_Io; 1Eh6ti
procedure Hello is Y?v{V>;*A
begin 8AQ__&nT
Put_Line ("Hello, world!"); wQ9?Z.-$
end Hello; _)kTlX:,
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汇编语言 %zz,qs)Eu
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x86 CPU,DOS,TASM eXQLE]L]
MODEL SMALL |i\%>Y,
IDEAL %k'>bmJ
STACK 100H =1Hn<Xay0
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DATASEG D/YMovH%
HW DB 'Hello, world!$' i_e%HG
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CODESEG oJ?,X^~_
MOV AX, @data UQ#t &
MOV DS, AX GIZw/L7Yb
MOV DX, OFFSET HW Ge7Uety
MOV AH, 09H 9? y&/D5O
INT 21H H<9_BA?
MOV AX, 4C00H r yNe=9p
INT 21H %<0'xJ%%Q
END [\3W_jR
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x86 CPU,GNU/Linux,NASM gA}?X
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 6Ts[NXa
;Enter this into "hello.asm" then type: }jg1..)"<
;"nasm -f elf hello.asm" N*+ L'bO
;"ld hello.o -o hello" OcLahz6
;"./hello" )G),iy
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section .data ;data section declaration "`NAg
msg db 'Hello World!',0AH GTM@9^
len equ $-msg ;string length 0`V;;w8
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section .text ;code section declaration [/o BjiBA
global _start ;entry point (start of execution) 8]mRX~
_start: mov edx,len ;string length B$M4f7
mov ecx,msg ;string start 6UI6E)g
mov ebx,1 ;file handle: stdout A0,h7<i
mov eax,4 ;sys_write a<J<Oc!
int 80h ;kernel system call iPdS>ee
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mov ebx,0 ;return value Kr?<7vMT5
mov eax,1 ;sys_exit ~BiLzT1,
int 80h ;kernel system call Gz52^O:
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x86 CPU,Windows,MASM32 y+p"5s"
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.model flat,stdcall w3;{z ,,T
option casemap:none vi.INe
;Include 文件定义 R^B8** N
include windows.inc NxSSRv^rx
include user32.inc *zQhTYY
includelib user32.lib Id1de>:;
include kernel32.inc orOq5?3
includelib kernel32.lib EU
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;数据段 ~)F_FS
.data osc A\r
szCaption db 'A MessageBox!',0 nDcH;_<;9a
szText db 'Hello,world!',0 h$mGawvZ~
;代码段 PhAD:A
.code \l%##7DRp]
start: a6@k*9D>
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK jvxCCYXR
invoke ExitProcess,NULL =YIosmr
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> YYL3a=;`a
end start E
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BEGIN { print "Hello, world!" } EeHghq
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BASIC ?D|kCw69SE
传统版BASIC(例如GWBASIC): * =*\w\
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10 PRINT "Hello, world!" R13V}yL
20 END U&43/;<,
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或在提示符输入: I:w+lchAMe
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?"Hello, world!":END na*Z0y
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现代版BASIC(例如Quick BASIC): 6v74mIRn'?
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Print "Hello, world!" v}id/brl
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以下的语句在Quick BASIC中同样有效: u1gD*4+
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? "Hello,world!" re,}}'
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GET "LIBHDR" 0dQ\Y]b
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LET START () BE q&}+O
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WRITES ("Hello, world!*N") /EJy?TON*
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Befunge ;.<HpDfG_
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Brainfuck acgx')!c
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#include <stdio.h> tK?XU9o
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int main(void) pe>?m ^gz[
{ Jw>na _FJ
printf("Hello, world!\n"); TA8
return 0; OOXP1L
} -%Ce
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C++ mi7~(V>
#include <iostream> NTO.;S|2%
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int main() O<$j}?2
{ =q|//*t2
std::cout << "Hello, world!" << std::endl; sl(go^
return 0;
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C++/CLI vP+qwvpGr
int main() HV7f%U
{ G'';VoW=
System::Console::WriteLine("Hello, world!"); 0P{8s
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C# (C Sharp) [Q\(kd*4
class HelloWorldApp 3xmPY.
{ D #7q3s
public static void Main() P2 qC[1hYH
{ *cCj*Zr]
System.Console.WriteLine("Hello, world!"); [wnaF|h
} ]=]MJ3_7
} ykH@kv Qt
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COBOL yq<W+b/
IDENTIFICATION DIVISION. P_H_\KsH*(
PROGRAM-ID. HELLO-WORLD. lDF7~N9J_
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ENVIRONMENT DIVISION. e\f\CMb
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DATA DIVISION. (d*||"
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PROCEDURE DIVISION. WS?Y8~+{5
DISPLAY "Hello, world!". ?AQA>D#W
STOP RUN. ts("(zI1E
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Common Lisp l<<9H-O
(format t "Hello world!~%") /[ft{:#&t
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DOS批处理 dTlEEgR
@echo off jxt]Z3a ~0
echo "Hello, world!" TZ3gJ6 Cb
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Eiffel .2_xTt
class HELLO_WORLD m(EVC}Y
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creation &p*rEs
make 84i0h$ZZo
feature &.#dZ}J
make is ipt]qJFd
local 8Bh
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io:BASIC_IO hd[t&?{=
do P"t Dq&
!!io k,8^RI07@
io.put_string("%N Hello, world!") t]iKU@3
end -- make }<w9Jfr"X
end -- class HELLO_WORLD %qqeL
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Erlang D0MW~Y6{
-module(hello). 3H4T*&9;n
-export([hello_world/0]). G `B=:s]
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hello_world() -> io:fwrite("Hello, World!\n"). Y?zo")
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Forth sJl>evw
." Hello, world!" CR Z:V<