“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。 :3aZ_
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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》。 H0P:t(<Gt
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以下是用不同语言写成的Hello World程序的几个例子: &oXN*$/dlJ
Ada 9ER!K
with Ada.Text_Io; use Ada.Text_Io; V9%!B3Sb
procedure Hello is ) ]
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begin s`63
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Put_Line ("Hello, world!"); a58]#L~
end Hello; }F<=
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汇编语言 X<*-d6?gD`
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x86 CPU,DOS,TASM (l]_0-Z
MODEL SMALL ZKp9k6
IDEAL u#^~([I
STACK 100H RAUD8Z
pHKGK7 S-
DATASEG %%h0 H[5*
HW DB 'Hello, world!$' N}rc3d#
1[k.apn
CODESEG *< ?~
MOV AX, @data T}r}uw`
MOV DS, AX > %B7/l$
MOV DX, OFFSET HW +F@ZVMp
MOV AH, 09H p/WE[8U
INT 21H Y0Bd[
MOV AX, 4C00H H2oD0f|
INT 21H Q@aDa 8Z
END eX3|<Bf
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x86 CPU,GNU/Linux,NASM ]~d!<x#+
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 1}XESAX;0
;Enter this into "hello.asm" then type: r
t\eze_5A
;"nasm -f elf hello.asm" bb}$7v`G
;"ld hello.o -o hello" Jnl#d0)
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;"./hello" trm-&e7q?;
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section .data ;data section declaration t1rAS.z&
msg db 'Hello World!',0AH Z.E@aml\
len equ $-msg ;string length
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section .text ;code section declaration <4,LTB]9-
global _start ;entry point (start of execution) mh"9V5T
_start: mov edx,len ;string length M'>8P6O
mov ecx,msg ;string start P&.-c _
mov ebx,1 ;file handle: stdout MG(qQ#;j/
mov eax,4 ;sys_write ?f&O4H
int 80h ;kernel system call 6)j/"9oY
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mov ebx,0 ;return value W0;MGBfb
mov eax,1 ;sys_exit gq~6jf>
int 80h ;kernel system call Gq0Q}[53
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x86 CPU,Windows,MASM32 k@Mt8Ln
.386
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.model flat,stdcall *9)yN[w
option casemap:none pZV=Co3!I
;Include 文件定义 _]6n]koD,
include windows.inc _,bDv`>Ra
include user32.inc bW?cb5C
includelib user32.lib r"bV{v
include kernel32.inc -4LckY=]1
includelib kernel32.lib >}) W5Y+
;数据段 >&D}^TMYY
.data @D+2dT0[M
szCaption db 'A MessageBox!',0 }zyh!
szText db 'Hello,world!',0 kmu r={IR
;代码段 eYD -8*
.code =)IV^6~b
start: 2kW*Z7@D
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK &[qJ=HMm I
invoke ExitProcess,NULL {2T;^+KE
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> !.@F,wZvY
end start d$#DXLA\P
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AWK &b9bb{y_$K
BEGIN { print "Hello, world!" } 1dl(`=^X
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BASIC 'j'G4P_G
传统版BASIC(例如GWBASIC): K_o[m!:jU
PS'SI X
10 PRINT "Hello, world!" "a=dx|
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20 END jSdW?IH
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或在提示符输入: I~)A!vp
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?"Hello, world!":END 3e ?J#;
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现代版BASIC(例如Quick BASIC): /j"aOLL|
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Print "Hello, world!" "5b4fQ;x
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以下的语句在Quick BASIC中同样有效: bmI6OIWl
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? "Hello,world!" BNq6dz$ J
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BCPL }dpE>
GET "LIBHDR" -muP.h/
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LET START () BE Wp(Rw4j
$( 35n'sVn
WRITES ("Hello, world!*N") 8/zv3.+[
$) fR#W#n#m
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Befunge w-P;E!gTt
"!dlrow olleH">v q]#j,}cN9
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Brainfuck 5`Y>!|
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+++++++++++++++.>.+++.------.--------.>+.>. z yrjb8
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#include <stdio.h> B_S))3
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int main(void) E'^ny4gL
{ <$Djags,F
printf("Hello, world!\n"); N14Q4v-*x
return 0; _V(FHjY
} =kjD ]+l
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C++ S~U5xM^s
#include <iostream> wQ?Z y;/S
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int main() Oar%LSkPRz
{ uoTc c|Kc
std::cout << "Hello, world!" << std::endl; GjyTM
return 0; m'WGK`WIm
} V\=%u<f
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C++/CLI >%A~ :
int main()
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{ DaqlL
System::Console::WriteLine("Hello, world!"); 8=u88?Bh
} J|CCTXT
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C# (C Sharp) N`O0jH{
class HelloWorldApp wcW7k(+0
{ pV*d"~T
public static void Main() T;v^BVn
{ r{wf;5d(
System.Console.WriteLine("Hello, world!"); #>2cfZ`6'J
} DTl&V|h$
} ]L?WC
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COBOL 8#IEE|1
IDENTIFICATION DIVISION. :3D[~-/S
PROGRAM-ID. HELLO-WORLD. ^_/gM[H.
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ENVIRONMENT DIVISION. e?WI=Og
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DATA DIVISION. wrVR[v>E<
S"/gZfxer
PROCEDURE DIVISION. orhzeOi\
DISPLAY "Hello, world!". mxICQ>s
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STOP RUN. 4"eeEs h
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tDtqTB}
Common Lisp j6Au<P
(format t "Hello world!~%") 1~vv<`-
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DOS批处理 c+jnQM'
@echo off p7[&H