“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。 2a'b}<|[(
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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》。 bCHJLtDQ
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以下是用不同语言写成的Hello World程序的几个例子: % 3d59O
Ada xa5^h]o
with Ada.Text_Io; use Ada.Text_Io; i2j_=X-
procedure Hello is HJ?p,V q5_
begin -f@~{rK.L
Put_Line ("Hello, world!"); v^1_'PAXu
end Hello; k%YvJ XL
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=#
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汇编语言 Clr~:2g\
_LU]5$\b
x86 CPU,DOS,TASM =&jLwy
MODEL SMALL o *)>aw
IDEAL L}5nq@Uu)
STACK 100H Z`y%#B6x.
Y>
ElE-
DATASEG 1vk&;
HW DB 'Hello, world!$' Opx"'HC@G
i%w[v_j
CODESEG |(G^3+5Uwm
MOV AX, @data >Vc;s!R
MOV DS, AX I!>pHF4
MOV DX, OFFSET HW m<qPj"g~L
MOV AH, 09H aqJ>l}{
INT 21H mX66}s}#
MOV AX, 4C00H VN6h:-&iY
INT 21H 0aj4.H*%
END =$xxkc.~G
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x86 CPU,GNU/Linux,NASM %ub\+~
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). bwN>E+
;Enter this into "hello.asm" then type: 8WU_d`DF
;"nasm -f elf hello.asm" V|[Y9<*
;"ld hello.o -o hello" D32~>J.F
;"./hello" ]yI~S(
:Rl*64}
section .data ;data section declaration zt,pV\|
msg db 'Hello World!',0AH Af y\:&j
len equ $-msg ;string length F|9 :$Jpw!
4UP#~
section .text ;code section declaration 6?\X)qBI
global _start ;entry point (start of execution) h[HFZv~{
_start: mov edx,len ;string length ?=$=c8xw
mov ecx,msg ;string start q$IgkL
mov ebx,1 ;file handle: stdout Jd#g"a>zZ
mov eax,4 ;sys_write "g}m xPe
int 80h ;kernel system call x[L/d"Wf
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mov ebx,0 ;return value vt8z=O
mov eax,1 ;sys_exit h2~b%|Pv
int 80h ;kernel system call y/{&mo1\
xg*)o* ?
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x86 CPU,Windows,MASM32 %z1y3I|`[t
.386 X|]&K
.model flat,stdcall P(h[QAM
option casemap:none ^}Vx5[
;Include 文件定义 VaKBS/y"
include windows.inc X'[93
C|K
include user32.inc sX_6qKUH
includelib user32.lib 3s25Rps
include kernel32.inc h|m>JDxn
includelib kernel32.lib \ k&(D*u
;数据段 o +-G@16
.data >Vp#
szCaption db 'A MessageBox!',0 ~t0\Q; @($
szText db 'Hello,world!',0 jiAKV0lX
W
;代码段 Ek#?B6s
.code 4l)Q
start: |a!y%R=
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK ;(0<5LQ
invoke ExitProcess,NULL FQ6jM~
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> XQW9/AzN f
end start _}G1/`09#
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AWK R8"qDj
BEGIN { print "Hello, world!" } H!6nIS9yxt
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BASIC ftr?@^
传统版BASIC(例如GWBASIC): d9bc>5%-F
o]gS=iLp
10 PRINT "Hello, world!" UB5X2uBv
20 END [*i6?5}-
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或在提示符输入: C{gY*+
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?"Hello, world!":END P`ZYm
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现代版BASIC(例如Quick BASIC): svT1b'=\$I
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Print "Hello, world!" 7|vB\[s
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以下的语句在Quick BASIC中同样有效: A08b=S
FEoH$.4
? "Hello,world!" ;giW
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6B pm+}
BCPL >n!,KUu]
GET "LIBHDR" *U{E[<k{
Wu:@+~J.h
LET START () BE R\VM6>SN'S
$( X.YMb
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WRITES ("Hello, world!*N") L~Hgf/%5
$) k uEB
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c+_F}2)
Befunge N7}Y\1-8
"!dlrow olleH">v zLeId83>
, Gd=l{~
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Brainfuck "M`ehgCBr
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< 0SJ7QRo|K
+++++++++++++++.>.+++.------.--------.>+.>. CHZjK(a
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C UN,y/V
#include <stdio.h> fxR}a,a
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int main(void) ohy?l
{ IQ9jTkW l
printf("Hello, world!\n"); ku`bwS
return 0; J &<uP)<
}
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Ku
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C++ `/1Zy}cD
#include <iostream> uI'g]18Hi
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int main() HDTdOG)
{ g;M\4o
std::cout << "Hello, world!" << std::endl; *`(/wE2v]
return 0; A\6Q*VhK
} $1(FN+ Mb
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XI rNT:h4
C++/CLI &;V3[
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int main() IdvBQ [Gj
{ x>$!R\Cj
System::Console::WriteLine("Hello, world!"); YflotlT}
} REmD*gf
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INHN=KY{
C# (C Sharp) o}iqLe\
class HelloWorldApp VB?mr13}G
{ +]!`>
public static void Main() qZ39TTQ*p
{ JMT?+/Q bu
System.Console.WriteLine("Hello, world!"); kOe~0xoT@u
} .QhH!#Y2D
} !iOuIYjV
V
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D(GAC!|/]
COBOL r7I,%}k
IDENTIFICATION DIVISION. F!|?S:X
PROGRAM-ID. HELLO-WORLD. kP6P/F|RcZ
kZlRS^6
ENVIRONMENT DIVISION. >v+ia%o
kS>'6xXH
DATA DIVISION. B1&