“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。 :|ahu
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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》。 j$lf>.[I
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以下是用不同语言写成的Hello World程序的几个例子: P'}B5I~
Ada m:0[as=
with Ada.Text_Io; use Ada.Text_Io; @x!+_z
procedure Hello is #UwX~
begin [742s]j
Put_Line ("Hello, world!"); >)diXe}j
end Hello; iWA?FBv
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汇编语言 B6Ajcfy
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x86 CPU,DOS,TASM [Pjitw/?
MODEL SMALL I7=A!C"
IDEAL 5#X R1#`
STACK 100H FZ]+(Q"]:
Eld[z{n"
DATASEG [\h?mlG?
HW DB 'Hello, world!$' )'RaMo` 4
[~\]<;;\
CODESEG z'1%%.r;FM
MOV AX, @data {{M/=WqC
MOV DS, AX |`o1B;lc
MOV DX, OFFSET HW 84e8z {
MOV AH, 09H #6D>e~>n
INT 21H 4]p#9`j
MOV AX, 4C00H kkb+qo
INT 21H o_k)x3I?
END GRofOJ
$- %um
5cU:wc
x86 CPU,GNU/Linux,NASM j[w=pF,o
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). Ck%if
;Enter this into "hello.asm" then type: .b<W*4{j0H
;"nasm -f elf hello.asm" T2azHo7
;"ld hello.o -o hello" &?1^/]'"r
;"./hello" BV7P_!vt
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section .data ;data section declaration #Y
msg db 'Hello World!',0AH lP]Y^Gz
len equ $-msg ;string length _$D!"z7i
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section .text ;code section declaration kRX?o'U~C
global _start ;entry point (start of execution) >D~8iuy]8.
_start: mov edx,len ;string length [ @"6:tTU
mov ecx,msg ;string start v_/<f&r
mov ebx,1 ;file handle: stdout ly6zz|c5
mov eax,4 ;sys_write ,t wB" *
int 80h ;kernel system call (F.w?f4B3
r`EjD}2d
mov ebx,0 ;return value g:y4C6b
mov eax,1 ;sys_exit h qjjd-S0
int 80h ;kernel system call <? !'
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Ab j7
x86 CPU,Windows,MASM32 Xfqin4/jC
.386 m}RZ)c
.model flat,stdcall m9:ah<
option casemap:none cYC^;,C &|
;Include 文件定义 A]i!131{w|
include windows.inc ;sAGTq
include user32.inc SN L-6]j
includelib user32.lib hf2bM
`d
include kernel32.inc 4\v &8">LL
includelib kernel32.lib `W~
;数据段 DQXcf*R
.data 3rMJC\h
szCaption db 'A MessageBox!',0 N_iy4W(NU
szText db 'Hello,world!',0 .43cI(
;代码段 QQV8Vlv"
.code $m*Gu:#xm&
start: pXN'vP
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK N5sVRL"7
invoke ExitProcess,NULL ~:f..|JM
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ZBY2,%nAo
end start N AY3.e
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AWK L{8_6s(:
BEGIN { print "Hello, world!" } {9V.l.Q
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BASIC ,z/aT6M?H
传统版BASIC(例如GWBASIC): g([:"y?
x:!s+q`
s
10 PRINT "Hello, world!" *w*>\ZhOm
20 END !1=OaOT
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或在提示符输入: JRFUNy1+e1
ws!~MSIy
?"Hello, world!":END 6Nn+7z<*&z
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现代版BASIC(例如Quick BASIC): \2a;z<(
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Print "Hello, world!" s[0`
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以下的语句在Quick BASIC中同样有效: 4^2>KC_
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? "Hello,world!"
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BCPL I]e+5 E0
GET "LIBHDR" ;]=w6'dP!
[F+W]Jk,
LET START () BE Yn="vpM1
$( d:K\W[$Bz
WRITES ("Hello, world!*N") Z8xB
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$) .06D_L"M
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Befunge Ri" hU/H{
"!dlrow olleH">v lNg){3
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ad
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+++++++++++++++.>.+++.------.--------.>+.>. ;n(f?RO3X
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C rn*'[i?
#include <stdio.h> ,*6K3/kW
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int main(void) mXyP;k
{ ;i6~iLY
printf("Hello, world!\n"); ;NRh0)%|o
return 0; [C6ba{9B
} B1nm?E 0i
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C++ k"i3$^v8
#include <iostream> \vT~2Y(K
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int main() <5z!0m-G
{ CipDeqau2
std::cout << "Hello, world!" << std::endl; ^*.$@M
return 0; 23^>#b7st
} VM\R-[
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C++/CLI T@yQOD7
int main() BkXv4|UE
{ iG6]Pr|;e
System::Console::WriteLine("Hello, world!"); {HEWU<5
} R~oJ-}iYX
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C# (C Sharp) I&La0g