“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。 vl*RRoJ
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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》。 *Cb(4h-
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以下是用不同语言写成的Hello World程序的几个例子: by06!-P0[
Ada ~b7Nzzfo
with Ada.Text_Io; use Ada.Text_Io; W"Rii]GK"
procedure Hello is e+6~JbMV
begin Z?x]HB`r
Put_Line ("Hello, world!"); 7]v-2
*
end Hello; TRq~n7Y7C
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汇编语言 N4Lk3]
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x86 CPU,DOS,TASM ,H%\+yn{
MODEL SMALL eP2 y U
IDEAL ld?M,Qd
STACK 100H ;I7Z*'5!
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DATASEG ~J2Q0Jv
HW DB 'Hello, world!$' wd]Yjr#%Ii
W[?B@ sdSZ
CODESEG L9kP8&&KK
MOV AX, @data B 3h<K}
MOV DS, AX +|?c_vD
MOV DX, OFFSET HW E7<:>Uh
MOV AH, 09H _NkN3f5 1L
INT 21H 4|e#b(!
MOV AX, 4C00H VO`A
INT 21H 5R Hs
END b#m47yTW9<
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x86 CPU,GNU/Linux,NASM !eq]V9
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). Yru[{h8hw`
;Enter this into "hello.asm" then type: xpxm9ySwu
;"nasm -f elf hello.asm" yR!>80$j
;"ld hello.o -o hello" bDo'hDmW
;"./hello" 'KL(A-}!
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section .data ;data section declaration dF,FH-
msg db 'Hello World!',0AH VJ"3G;;
len equ $-msg ;string length t5k&xV=~
#
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section .text ;code section declaration RFC;1+Jn
global _start ;entry point (start of execution) Wg%-m%7O
_start: mov edx,len ;string length _#O?g=1
mov ecx,msg ;string start #r:`bQ0;
mov ebx,1 ;file handle: stdout 7q 2YsI
mov eax,4 ;sys_write =I(s7=Liu
int 80h ;kernel system call z!+<m<
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mov ebx,0 ;return value b{rmxtx
mov eax,1 ;sys_exit f#~Re:7.c
int 80h ;kernel system call yFt7fdl2
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x86 CPU,Windows,MASM32 rieQ&Jt"
.386 mTfMuPPs[
.model flat,stdcall mSfhl(<L
option casemap:none ^H4iHjg
;Include 文件定义 /aqN`
include windows.inc DBUwf1=qj
include user32.inc 2YKM9Ks
includelib user32.lib J[H?nX9
include kernel32.inc j,xPN=+hT
includelib kernel32.lib l5[xJH
;数据段 6iG<"{/U5
.data PHvjsA%"
szCaption db 'A MessageBox!',0 ^wa9zs2s;/
szText db 'Hello,world!',0 Q/c
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;代码段 s%oAsQ_y
.code aS vE
start: $O'2oeM
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK <o+
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invoke ExitProcess,NULL p2vBj. *J
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 2.D!4+&
end start NE3wui1 V
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BEGIN { print "Hello, world!" } i4n
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BASIC d7J[.^\
传统版BASIC(例如GWBASIC): 4~A#^5J
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10 PRINT "Hello, world!" xzl4v=7
20 END =t$mbI
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或在提示符输入: yvWzc
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?"Hello, world!":END &8+6!TN7
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现代版BASIC(例如Quick BASIC): CY3 \:D0I
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Print "Hello, world!" :F>L;mp
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以下的语句在Quick BASIC中同样有效: qH%L"J
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? "Hello,world!" EO/cW<uV'
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GET "LIBHDR" <]Pix)
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LET START () BE ;}eEG{`Y
$( |<3Q+EB^
WRITES ("Hello, world!*N") B#GZmv1
$) ~I\r1Wj;
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Befunge L2>?m`wp
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Brainfuck vQBY1-S
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+++++++++++++++.>.+++.------.--------.>+.>. XuFm4DEJ
=>:% n
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C P96Cw~<Q?
#include <stdio.h> UOLTCp?M;J
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int main(void) (ciGLfNG
{ _yxe2[TD
printf("Hello, world!\n"); L^5&GcHP0
return 0; ^;)SFmjg%
} p9&gEW
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C++ ,WO%L~db
#include <iostream> 2w x[D
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int main() zfP[1
{ oz\{9Lwc
std::cout << "Hello, world!" << std::endl; K4?t' dd]
return 0; iJCY /*C}
} X|-v0 f
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C++/CLI d739UhKC
int main() YoV^xl6g
{ /^z/]!JG:V
System::Console::WriteLine("Hello, world!"); )T.pjl
} <<7,kfR
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C# (C Sharp)
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class HelloWorldApp 3P+4S|@q(4
{ 4hsPbUx9
public static void Main() r+[#%%}ea
{ 80FCe(U
System.Console.WriteLine("Hello, world!"); tAb;/tM3I
} <t?x 'r?@
} 7~!I2DV_
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COBOL aWHd}%
IDENTIFICATION DIVISION. sW]yuu!/
PROGRAM-ID. HELLO-WORLD. @ 7Q*h
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ENVIRONMENT DIVISION. S4l)TtY
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DATA DIVISION. LCo1{wi
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PROCEDURE DIVISION. %gV)arwK
DISPLAY "Hello, world!". lF;ziF
STOP RUN. 4B:\
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Common Lisp )^jQkfL
(format t "Hello world!~%") T!m42EvIvE
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DOS批处理 8eOl@}bV
@echo off w$DG=!
echo "Hello, world!" 17V\2=Io
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Eiffel 4 "pS
class HELLO_WORLD BlkSWW/
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