“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。 :v$][jZ2
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将Hello World程序作为第一个学写的程序,现在已经成为一种传统。该程序最早出现在由Brian Kernighan和Dennis Ritchie写的计算机程序设计教程《C语言程序设计》。 ;RR\ Hwix
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以下是用不同语言写成的Hello World程序的几个例子: K9\r2w'T'
Ada >`E
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with Ada.Text_Io; use Ada.Text_Io; &9j*Y
procedure Hello is eDkJ+5b
begin :{8,O-
Put_Line ("Hello, world!"); 8uh^%La8b.
end Hello; ,8Eg/
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lE=&hba
汇编语言 dbe\ YE
f;{K+\T
x86 CPU,DOS,TASM |K.J@zW
MODEL SMALL s~i73Qk/
IDEAL @IE.@1
STACK 100H p;xMudM
jjJvyZi~J
DATASEG UlNx5l+k
HW DB 'Hello, world!$' 7!;48\O]w
i]$/& /
CODESEG BV"l;&F[
MOV AX, @data lZ'ZL*
MOV DS, AX Xd 5 vNmQn
MOV DX, OFFSET HW 'QOV! D
MOV AH, 09H Z [Q jl*
INT 21H 3[*x'"Q;H
MOV AX, 4C00H %(}%#-X
INT 21H )B$Uo,1
END X$A[~v
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x86 CPU,GNU/Linux,NASM P*!~Z*"
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 9O4\DRe5c
;Enter this into "hello.asm" then type: |s!<vvp]
;"nasm -f elf hello.asm" 16-1&WuY@
;"ld hello.o -o hello" Y 8Dn&W
;"./hello" 7W.z8>p
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section .data ;data section declaration =v !'?
msg db 'Hello World!',0AH $?*XPzZ
len equ $-msg ;string length Q $^)z_jai
-n"7G%$M
section .text ;code section declaration w678
global _start ;entry point (start of execution) 0Qr|!B:+9)
_start: mov edx,len ;string length eW\C@>Ke
mov ecx,msg ;string start WQ1K8B4
mov ebx,1 ;file handle: stdout 6[T)Q ^0`
mov eax,4 ;sys_write FT;I|+H*P
int 80h ;kernel system call |Duf
3u
cv7.=*Kb;
mov ebx,0 ;return value -~NjZ=vPh
mov eax,1 ;sys_exit #,S0uA
int 80h ;kernel system call =`EVg>+^
&BOG&ot
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x86 CPU,Windows,MASM32 DR<=C`<4(
.386 Hd ${I",
.model flat,stdcall k vF[d{l
option casemap:none tGwQUn
;Include 文件定义 OI)U c .
include windows.inc h[& \OD,P
include user32.inc cnL@j_mb
includelib user32.lib
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Z"&
include kernel32.inc WNp-V02l
includelib kernel32.lib ekPn`U
;数据段 ,|^ lqY
.data jRBKy8?[C
szCaption db 'A MessageBox!',0 S<o\.&J
szText db 'Hello,world!',0 \E8CC>Jd
;代码段 S{S.H?{F
.code +5N09$f;R
start: 1Gp|_8
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 7e/K YS+!s
invoke ExitProcess,NULL A 6j>KTU
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> A3A"^f$$
end start #eY?6Kjn
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K*aGz8N
AWK JQ<9~J
BEGIN { print "Hello, world!" } 4mci@1K#^
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BASIC >U62vX"
传统版BASIC(例如GWBASIC): t}fU 2Yb
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10 PRINT "Hello, world!" E>&oe&`o'
20 END PbIir=
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或在提示符输入: l.%[s6
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?"Hello, world!":END EViDMp"
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现代版BASIC(例如Quick BASIC): wh#x`Nc
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Print "Hello, world!" =P`l+k3
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以下的语句在Quick BASIC中同样有效: *GC9o/
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? "Hello,world!" sSsRn*LN-:
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BCPL X0BBJ( e
GET "LIBHDR" R zn%!d^$>
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LET START () BE x`Ik747^v
$( (I ~r~5^
WRITES ("Hello, world!*N") 2|}KBny
$) Wu
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='vkd=`Si
6#(rWW"_
Befunge ,H:{twc
"!dlrow olleH">v ?T7ndXX
, 822 jZ
sb
^_@ *K=Yrisz
OO-b*\QW
"dFuQB
Brainfuck ]7
2wv#-
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< hC2_Yr>N%
+++++++++++++++.>.+++.------.--------.>+.>. RrRE$g
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C UO8./%'
#include <stdio.h> t(\P8J
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int main(void) t'DYT"3
{ rRd8W}B
printf("Hello, world!\n"); "Rq)%o$Z
return 0; hG
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} tN&_f==e
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C++ |<w
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#include <iostream> 4<l&cP
p WLFJH}N
int main() UkgiSv+
{ /+{1;}AT
std::cout << "Hello, world!" << std::endl; O>Ao#_*hOb
return 0; <"}WpT
} >
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%#-'|~
C++/CLI 6),VN>j
int main() FX:'38-fk
{ X.hVMX2B
System::Console::WriteLine("Hello, world!"); YMIX|bj6Y
} mFeoeI,Jv
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C# (C Sharp) _%6Vcy
class HelloWorldApp &+-]!^2o
{ @DK;i_i
public static void Main() 0OPpA Ll
{
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System.Console.WriteLine("Hello, world!"); &Ez]pKjB
} riY[p,
} 8VLD yX2-
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(d$ksf_[%f
COBOL Kk<MS$Ov
IDENTIFICATION DIVISION. 4xnM7t\
PROGRAM-ID. HELLO-WORLD. t9+ME|
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ENVIRONMENT DIVISION. _)F0oC {
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DATA DIVISION. EE[JXoke
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PROCEDURE DIVISION. )R]gJ_,c
DISPLAY "Hello, world!". m9m]q&hx
STOP RUN. [m{uJdj\
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k=r)kkO)
Common Lisp Fmux#}Z
(format t "Hello world!~%") m-)yQM8
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DOS批处理 Q2 @Ugt$
@echo off Nw|m"VLb
echo "Hello, world!" u @eKh3!
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SM@RELA'Lb
Eiffel #E#.`/4
class HELLO_WORLD GPVqt"TY
ye-R
creation _Vf0MU;3f+
make _/%,ZoZ2
feature SwVdo|%.?
make is .*+KQA8
local )3RbD#?
io:BASIC_IO >Vvjs
do +7|Q d}\X
!!io K3($,aB}
io.put_string("%N Hello, world!") /pOK4"
end -- make *>f-UNV
end -- class HELLO_WORLD Nw=mSW^E
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Erlang +ZxG<1&
-module(hello). AB1,G|L
-export([hello_world/0]). Nq=r404
#}U*gVYe
hello_world() -> io:fwrite("Hello, World!\n"). m_n*_tX
yk7 l{F
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Forth UM QsYD)
." Hello, world!" CR \"^.>+
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Fortran -yH8bm'0"
WRITE(*,10) FELTmQUV
10 FORMAT('Hello, World!') P-~kxb9aa
STOP Lm}J&^>
END WPzq?yK
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HTML t,m},c(B:
<HTML> gNoQ[xFx32
<HEAD> AyUiX2=w1
<TITLE> Hello World! </TITLE> gkN
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</HEAD> XK7$Xbd
<BODY> [J71aH
<p>Hello World!</p> qq1@v0
</BODY> GDMg.w4Yk
</HTML> %x G3z7;
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