“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。 r@\,VD6J
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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》。 PpI+@:p[
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以下是用不同语言写成的Hello World程序的几个例子: qFB9,cUqh
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with Ada.Text_Io; use Ada.Text_Io; RRK^~JQI.2
procedure Hello is Mp}!+K
begin Nu>sp,|A
Put_Line ("Hello, world!"); q_OY sg
end Hello; 2X
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汇编语言 btJ,dpir
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x86 CPU,DOS,TASM R;5QD`
MODEL SMALL wR`w@5,d
IDEAL /r #b
STACK 100H U0lqGEZ
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DATASEG My`josJ`Pb
HW DB 'Hello, world!$' $fq-wl-=
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CODESEG (Q*2dd>
MOV AX, @data LbLbJ{68
MOV DS, AX TW;|G'}$
MOV DX, OFFSET HW `Pz!SJ|
MOV AH, 09H S}XB
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INT 21H 1t}
(+NNjH
MOV AX, 4C00H o+PQ;Dl
INT 21H BZnp
#}f
END N>uZ t2
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x86 CPU,GNU/Linux,NASM
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;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 0%(4G83gw
;Enter this into "hello.asm" then type: 81%qM7v9H
;"nasm -f elf hello.asm" WHdqO8
;"ld hello.o -o hello" j};pv 2
;"./hello" , 4h!"c
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section .data ;data section declaration v)v{QNQp^
msg db 'Hello World!',0AH }kgjLaQ^N
len equ $-msg ;string length %BT)oH}
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section .text ;code section declaration $A5B{2
global _start ;entry point (start of execution) soFvrl^Ql+
_start: mov edx,len ;string length @eAGN|C5
mov ecx,msg ;string start o{YW
mov ebx,1 ;file handle: stdout ~ ]m@k'n
mov eax,4 ;sys_write =l?"=HF
int 80h ;kernel system call qW` XA
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mov ebx,0 ;return value <Bob#Tf
~
mov eax,1 ;sys_exit 8Pnqmjjj
int 80h ;kernel system call .wt>.mUH
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x86 CPU,Windows,MASM32 KqG$zC^N
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.model flat,stdcall c=jTs+h'
option casemap:none *n$m;yI
;Include 文件定义 z!Pdivx
include windows.inc }hObtAS
include user32.inc hz>yv@1
includelib user32.lib S{`!9Pii
include kernel32.inc F?+Uar|-a
includelib kernel32.lib HCe-]nMd
;数据段 o+6^|RP
.data J T0,Z
szCaption db 'A MessageBox!',0 qNuv?.7
szText db 'Hello,world!',0 $O8EiC!f6
;代码段 h\: tUEg#J
.code /hA}9+/
start: rwV u?W
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK D=pI'5&
invoke ExitProcess,NULL XQ4^:3Yc
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> v=yI#5
end start QBBJ1U
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BEGIN { print "Hello, world!" } wTgx(LtH
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BASIC %(wsGNd
传统版BASIC(例如GWBASIC): dA M ilTo
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10 PRINT "Hello, world!" Af!
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20 END 7+2aG
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或在提示符输入: +XaO?F[c
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?"Hello, world!":END ~]t2?SqNm
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现代版BASIC(例如Quick BASIC): `- uZv
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Print "Hello, world!" 3\U,Kg
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以下的语句在Quick BASIC中同样有效: Bbe/w#Z
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? "Hello,world!" uzn))/"
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GET "LIBHDR" jJ{
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LET START () BE ^Ihdq89 t
$( @0@'6J04
WRITES ("Hello, world!*N") "=5vgg3
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Befunge cK}
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Brainfuck tZ{q\+h
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#include <stdio.h> )^'B:ic
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int main(void) =rtA{g$)+
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printf("Hello, world!\n"); 0dX=
return 0; -"^WDs
} OQb9ijLeK
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C++
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#include <iostream> RlPByG5K
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int main() arH\QPaka'
{ J,M5<s[Xqt
std::cout << "Hello, world!" << std::endl; 36Y[7m=
return 0; I z=w2\r
} Xs,PT
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C++/CLI g4qdm{BL
int main() Ol5xyj
{ YaZ"&i
System::Console::WriteLine("Hello, world!"); &-)Y[#\J
} r0uXMr=Z96
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C# (C Sharp) N S}`(N
class HelloWorldApp G(3la3\(
{ E&tmWOMj>
public static void Main() Gbm_xEPC
{ M[N.H9
System.Console.WriteLine("Hello, world!"); z7pXpy \
} Z!l!3(<G.f
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COBOL YqCK#zT/
IDENTIFICATION DIVISION. *xVAm7_v
PROGRAM-ID. HELLO-WORLD. |(ju!&
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ENVIRONMENT DIVISION. uiEA=*axp
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DATA DIVISION. l5nDt$Ex
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PROCEDURE DIVISION. [)0 k}
DISPLAY "Hello, world!". 3NZFW{u
STOP RUN. wupD
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Common Lisp Afl'-
(format t "Hello world!~%") 17 iq
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