“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。 EZ.!rh~+
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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》。 l88A=iLgv
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以下是用不同语言写成的Hello World程序的几个例子: }pa9%BQI
Ada v`V7OD#:j]
with Ada.Text_Io; use Ada.Text_Io; l;sy0S"DO]
procedure Hello is Bm\qxQ
begin ;.wX@
Put_Line ("Hello, world!"); QRLJ_W^&u
end Hello; )RYG%
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汇编语言 YUQtMf9
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x86 CPU,DOS,TASM N$TL;T>
MODEL SMALL ;pD)m/$h`
IDEAL q!f1~ aG
STACK 100H q>s-Y|
4wi(?
DATASEG w[_x(Ojq;
HW DB 'Hello, world!$' =SD\Q!fA
\<vNVz7.D
CODESEG 0t#g}
MOV AX, @data yAL1O94
MOV DS, AX "+?Cz!i
MOV DX, OFFSET HW fWF|,A>>b
MOV AH, 09H ^). )
INT 21H D;Gq)]O
MOV AX, 4C00H H0a/(4/xg
INT 21H CzV(cSS9-
END {FN;'Uc
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x86 CPU,GNU/Linux,NASM d bS
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;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). /D_+{dtE
;Enter this into "hello.asm" then type: 0W`LVue
;"nasm -f elf hello.asm" _{jP;W
;"ld hello.o -o hello" sA9&/p/
;"./hello" -ng=l;
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section .data ;data section declaration Fg/dS6=n`?
msg db 'Hello World!',0AH wA`"\MWm
len equ $-msg ;string length gPzL*6OSA
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section .text ;code section declaration j<pw\k{i
global _start ;entry point (start of execution) AGYm';z3
_start: mov edx,len ;string length ,}xbAA#
mov ecx,msg ;string start P6Bl
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mov ebx,1 ;file handle: stdout 9Q W&$n^
mov eax,4 ;sys_write kC$&:\Rh
int 80h ;kernel system call u)Q;8$`
)a=/8ofe
mov ebx,0 ;return value o2-@o= F
mov eax,1 ;sys_exit ;r=b|B9c
int 80h ;kernel system call b'ml=a#i0
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f>$h@/-*
x86 CPU,Windows,MASM32 &~B5.sppnB
.386 ]%RNA:(F'
.model flat,stdcall (1pEEq84
option casemap:none -{|`H[nmD
;Include 文件定义 %;z((3F
include windows.inc %HtuR2#ca
include user32.inc 6Ggs JU
includelib user32.lib !C:r b
include kernel32.inc :f'&z47
includelib kernel32.lib '#O_}|ZN
;数据段 kE;O7sN
.data "`A :(<x
szCaption db 'A MessageBox!',0 !c<w SQ,
szText db 'Hello,world!',0 =He.fEy
;代码段 e=/&(Y
.code 0;~yZ?6_F
start: dMl+ko
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK YEYY}/YX
invoke ExitProcess,NULL SC#sax4N!=
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> oJ*1>7[ J
end start 0MIUI<;j
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AWK q}L+/+b
BEGIN { print "Hello, world!" } m:`@?n~..
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BASIC tPuut\ee
传统版BASIC(例如GWBASIC): % U`xu.
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10 PRINT "Hello, world!" Q
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20 END [A~G-
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或在提示符输入: *QE<zt
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?"Hello, world!":END ]!YtH]}
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现代版BASIC(例如Quick BASIC): v.Ogf5
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Print "Hello, world!" FQeYx-7
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以下的语句在Quick BASIC中同样有效: ^9"KTZc-*
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? "Hello,world!" Mxz,wfaH>
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BCPL =N.!k Vkl
GET "LIBHDR" ^!:"Q3
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LET START () BE h:qHR]
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$( Edt}",s7
WRITES ("Hello, world!*N") $v;dV@tB
$) P-z`c\Rt
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Befunge K <`>O,
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"!dlrow olleH">v e (\I_
, "/%89 HMD
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+++++++++++++++.>.+++.------.--------.>+.>. }VRvsZ
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C Z>A{i?#m
#include <stdio.h> -$4kBYC l+
-6E K#!+
int main(void) H/cTJ9zz
{ y8s=\`~PR
printf("Hello, world!\n"); c{88m/;eP
return 0; d!{7r7ob\
} ;[5r7
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C++ Up ?=m^
#include <iostream>
C B}BQd
;El <%{(
int main() BnEdv8\,&s
{ rFd@mO
std::cout << "Hello, world!" << std::endl; 6}&^=^-
return 0; f~\Xg7<
} 6M><(1fT
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C++/CLI Lx+`<<_dJ
int main() 12gw#J/)9h
{ fD6GQ*
System::Console::WriteLine("Hello, world!"); emWGIo
} q.oLmX
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C# (C Sharp) ;L6Xs_L~
class HelloWorldApp L$JI43HZ
{ .9 kyrlm
public static void Main() h[U7!aM
{ 6v47 QW|'
System.Console.WriteLine("Hello, world!"); O-GxUHwWr
} %Y',|+Arx
} nm):SEkC
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COBOL dB)[O9K)
IDENTIFICATION DIVISION. %,? vyY
PROGRAM-ID. HELLO-WORLD. #<#%>Y^
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ENVIRONMENT DIVISION. f-+.;`H)T
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DATA DIVISION. euZ(}+N&
?`. XK}
PROCEDURE DIVISION. zD_HyGf
DISPLAY "Hello, world!". =~,l4g\
STOP RUN. T|+$@o
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Common Lisp "L_-}BK
(format t "Hello world!~%") "?H+
u/8$
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DOS批处理 M:|/ijpN
@echo off Yw^ Gti'<
echo "Hello, world!" 3]S`|#J
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Eiffel -A;w$j6*
class HELLO_WORLD "^"'uO$
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creation
q)oN2-
make E\!n49
feature >Z"9rF2SW
make is +S0u=u65
local ,>w}xWSYpG
io:BASIC_IO pzSqbgfrQ
do {Q<0\`A
!!io %BICt @E
io.put_string("%N Hello, world!") h#O"Q+J9n
end -- make 4?]ZV_BD
end -- class HELLO_WORLD 1PIzV:L\
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