“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。 \CL`j
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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》。 N5s_o0K4TU
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以下是用不同语言写成的Hello World程序的几个例子: c" l~=1Dr
Ada rUyT5Vf
with Ada.Text_Io; use Ada.Text_Io; R38
w!6{
procedure Hello is .1}u0IbJ
begin sC#Ixq'ls7
Put_Line ("Hello, world!"); (d ( whlF
end Hello; M,9WF)p)V
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汇编语言 LR^b?.#>
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x86 CPU,DOS,TASM LvR=uD
MODEL SMALL 55AG>j&41
IDEAL [fb -G5x
STACK 100H |[qI2-e l?
aw,8'N)
DATASEG l+#`
HW DB 'Hello, world!$' $Fo ,$
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CODESEG vEb~QX0~
MOV AX, @data *Vc}W
MOV DS, AX o(a*Fk$
MOV DX, OFFSET HW qaUHcdH
MOV AH, 09H 2Zl65
INT 21H !~RD>N&n
MOV AX, 4C00H bi_R.sfK&
INT 21H J/mLB7^R
END IXH;QwR:
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x86 CPU,GNU/Linux,NASM TKmC/c
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 5Ph"*Rz%
;Enter this into "hello.asm" then type: ljk-xC p/
;"nasm -f elf hello.asm" _Q7)FK
;"ld hello.o -o hello" @P8q=j}l9
;"./hello" m{1By/U
>s{[d$
section .data ;data section declaration lUp 7#q
msg db 'Hello World!',0AH :gR`rc!
len equ $-msg ;string length <}e<Zf!
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section .text ;code section declaration U$-FQRM4K
global _start ;entry point (start of execution) lKm?Xu'yH
_start: mov edx,len ;string length osnDW
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mov ecx,msg ;string start 0w c+<CUW
mov ebx,1 ;file handle: stdout t%/5$<!b
mov eax,4 ;sys_write Qdtfi1_Y1
int 80h ;kernel system call ";GLX%C!{@
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mov ebx,0 ;return value Obw uyhjQ
mov eax,1 ;sys_exit =]D##R
int 80h ;kernel system call I*0W\Qz@
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& MAIm56~
x86 CPU,Windows,MASM32 iA:CPBv_mu
.386 b)df V=
.model flat,stdcall c xX
option casemap:none DO0["O74
;Include 文件定义 YT-t$QyL
include windows.inc "=Ziy4V
include user32.inc T\]z0M
includelib user32.lib Im#3sn
include kernel32.inc fc
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includelib kernel32.lib 3GaM>w}>W
;数据段 7%0PsF _
.data N!P* B$d
szCaption db 'A MessageBox!',0 ^+}<Q#y-
szText db 'Hello,world!',0 VJwzYl
;代码段 SX;FBO(p
.code {Xl
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start: v!W,h2:J
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK za24-q
invoke ExitProcess,NULL =n;ileGm+^
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ((H}d?^AJ
end start 5:YtBdP
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BEGIN { print "Hello, world!" } aZmSCi:&'
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BASIC :FK(*BUh
传统版BASIC(例如GWBASIC): V+E2nJ
ost~<4~
10 PRINT "Hello, world!" |vGz
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20 END D
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或在提示符输入: p[W8XX
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?"Hello, world!":END d`v]+HK
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现代版BASIC(例如Quick BASIC): Z EG
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Print "Hello, world!" {At1]>
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以下的语句在Quick BASIC中同样有效: W~gFY#w
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? "Hello,world!" vZ|m3;X
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BCPL 7|H !( a'
GET "LIBHDR" FCOSgEU
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LET START () BE 3:S
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$( V}3.K\7
WRITES ("Hello, world!*N") =7Nm=5@
$) P
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Befunge (2<0kqj%
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C $T~|@XH
#include <stdio.h> $UKV2c
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int main(void) *"4
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{ e>Is$+[`7
printf("Hello, world!\n"); QIGMP=!j
return 0; iv\?TAZC
} w0VJt<e*
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C++ >H[&Wa+_
#include <iostream> =|=9\3po
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int main() `[7&tOvSk
{ X,^J3Ek>O
std::cout << "Hello, world!" << std::endl; i3N _wv{
return 0; rAk*~OK
} '^n2]<
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C++/CLI HIeWgw^"
int main() +#n5w8T)M
{ c.,eIiL
System::Console::WriteLine("Hello, world!"); sl>4O]N
} mI"`.
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C# (C Sharp) &A]*"lt|w
class HelloWorldApp J3g>#N]='(
{ V_(lZDjh*
public static void Main() U3az\E)HV
{ PUF"^9v
System.Console.WriteLine("Hello, world!"); G23Mr9m5O
} (\>_{"*=
} j=M_>
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COBOL T&6{|IfM_
IDENTIFICATION DIVISION. _~fO8_vr
PROGRAM-ID. HELLO-WORLD. v`bX#\It
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