“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。 HMDuP2Y
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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》。 =woP~+
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以下是用不同语言写成的Hello World程序的几个例子: hBVm;`
Ada *\cU}qjk
with Ada.Text_Io; use Ada.Text_Io; YL78cWOs
procedure Hello is `g4N]<@z
begin piqh7u3~
Put_Line ("Hello, world!"); vP=H 2P
end Hello; Z4E6J'B8
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汇编语言 pG'?>]Rt4
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x86 CPU,DOS,TASM c
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MODEL SMALL %@|)&][hO
IDEAL 6/ T/A+u
STACK 100H oOaLD{g>
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DATASEG 5evk_f
HW DB 'Hello, world!$' e+:X%a4\
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CODESEG h:sf?X[
MOV AX, @data d1D=R8P_u
MOV DS, AX |o*qZ}6
MOV DX, OFFSET HW 6q!Q([D_
MOV AH, 09H esq~Ehr=
INT 21H 3\{\ al
MOV AX, 4C00H UZmo?&y
INT 21H 4mtO"'|
END uy~$
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x86 CPU,GNU/Linux,NASM b5I 8jPj4c
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). Z'l!/l!
;Enter this into "hello.asm" then type: :ln?PT
;"nasm -f elf hello.asm" q&_\A0
;"ld hello.o -o hello" ,4 q^(
;"./hello" l*huKSX}
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section .data ;data section declaration dLeos9M:
msg db 'Hello World!',0AH G l2WbY
len equ $-msg ;string length I+S fZ:q^
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section .text ;code section declaration -B!
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global _start ;entry point (start of execution)
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_start: mov edx,len ;string length cLvnLaA}
mov ecx,msg ;string start 3orL;(.G
mov ebx,1 ;file handle: stdout p#-=mXE/2
mov eax,4 ;sys_write eibkG
int 80h ;kernel system call [*I7^h%
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mov ebx,0 ;return value 5w{U/v$Z
mov eax,1 ;sys_exit ]YfG`0eK<
int 80h ;kernel system call Qh6vH9(D
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x86 CPU,Windows,MASM32 UH;bg}=8
.386 #3eI4KJ4+l
.model flat,stdcall Y,EF'Ot
option casemap:none mG@[~w+
;Include 文件定义 Evqy e;
include windows.inc u,}>I%21
include user32.inc .sOZ "=tW
includelib user32.lib u$aN~6HG
include kernel32.inc g>eWX*Pa|
includelib kernel32.lib yx6^ mis4
;数据段 VS>hi~j
.data ~X %cbFom=
szCaption db 'A MessageBox!',0 a?4Asn
szText db 'Hello,world!',0 3RxR'M1
;代码段 [D(JEO@ :
.code oL }d=x/
start: rg#/kd<?[V
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK o8IqO'
invoke ExitProcess,NULL AW9%E/{
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end start 3m2y<l<
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BEGIN { print "Hello, world!" } '%:E4oI
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BASIC m7XN6zX
传统版BASIC(例如GWBASIC): J
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10 PRINT "Hello, world!" 6z/&j} (
20 END EG8z&^O x
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或在提示符输入: <5CQ#^cK
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?"Hello, world!":END 9)j"|5H
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现代版BASIC(例如Quick BASIC): *laFG<;
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Print "Hello, world!" NcX-*o
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以下的语句在Quick BASIC中同样有效: I/v#!`L
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? "Hello,world!" 5"q{b1
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BCPL T:CWxusL
GET "LIBHDR" !4t%\N6Ib
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LET START () BE tEibxE
$( =U:]x'g(
WRITES ("Hello, world!*N") b
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$) @OHNz!Lj:d
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Befunge =umF C[.W
"!dlrow olleH">v fKua om9
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Brainfuck v57Kr ,
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+++++++++++++++.>.+++.------.--------.>+.>. eMH\]A~v"
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#include <stdio.h> C|QJQ@bj0
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int main(void) `WQpGBS_z_
{ vha@YPC=
printf("Hello, world!\n"); VrFI5_M/
return 0; Uf$IH!5;Z
} /J,&G:
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C++ ^^)\|kW?
#include <iostream> <R#:K7>O
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int main() jqoU;u`
{ :/NP8$~@j
std::cout << "Hello, world!" << std::endl; vF@.BM>
return 0; '9|R7
} Zo,]Dx
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C++/CLI Z?w=-
int main() Q $>SYvW
{ Szlww
System::Console::WriteLine("Hello, world!"); UAdj[m61
} Q9t.*+
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C# (C Sharp) VU|Cct&)
class HelloWorldApp 5d82M s
{ 9,
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public static void Main() #DHeEE
{ /s`xPxvt
System.Console.WriteLine("Hello, world!"); oga0h'
} XecU&
} Qp>Q-+e0
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COBOL ~9+\
IDENTIFICATION DIVISION. ymyk.#Z<%
PROGRAM-ID. HELLO-WORLD. *yA.D?
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ENVIRONMENT DIVISION. 2E3x=
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DATA DIVISION. cY*lsBo
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PROCEDURE DIVISION. &]/.=J
DISPLAY "Hello, world!". fBt7#Tc=U
STOP RUN. =t-503e.J
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Common Lisp *CXVA&?
(format t "Hello world!~%") u@zBE?
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DOS批处理 `{I-E5x
@echo off S b3@7^
echo "Hello, world!" pF"IDC
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Eiffel V]9?9-r
class HELLO_WORLD v<Ux+-
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creation !xK`:[B
make nEm+cHHo?
feature "$BWP
make is WChJ
<[]W
local %fz!'C_4
io:BASIC_IO $Mp#tH28
do "L" 6jT
!!io g< {jgF
io.put_string("%N Hello, world!") Sf\mg4,
end -- make <[7.+{qfW
end -- class HELLO_WORLD ,9p
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