“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*b+kSh
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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》。 .\$A7DD+A
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以下是用不同语言写成的Hello World程序的几个例子: hGD@v{/
Ada {c)\}s(}F
with Ada.Text_Io; use Ada.Text_Io; P@UE.0NYX
procedure Hello is Mu/(Xp6 2
begin -51LF=(!L
Put_Line ("Hello, world!"); '-A;B.GV%
end Hello; 1#3|PA#>
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汇编语言 rGNa[1{kRs
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x86 CPU,DOS,TASM O'98OH+u
MODEL SMALL A3tv'-e9
IDEAL toGd;2rl
STACK 100H L~/,;PHN
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DATASEG 1LS1 ZY
HW DB 'Hello, world!$' oQ-m
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CODESEG O'(Us!aq
MOV AX, @data DcBAncsK
MOV DS, AX GFLat
MOV DX, OFFSET HW *_I`{9~'
MOV AH, 09H }I
uqB*g[t
INT 21H bu6Sp3g
MOV AX, 4C00H :y7K3:d3
INT 21H ,u>LAo0
END 5FJLDT2Lg
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x86 CPU,GNU/Linux,NASM ZMlBd}H
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). &!4E3&+2m
;Enter this into "hello.asm" then type: vrb@::sy0T
;"nasm -f elf hello.asm" _fZec+oM
;"ld hello.o -o hello" 2iM}YCV
;"./hello" hNh!H<}|m8
ynM:]*~K
section .data ;data section declaration +&)/dHbL`]
msg db 'Hello World!',0AH mvH8hvD9
len equ $-msg ;string length G7CkP
TaSS) n
section .text ;code section declaration [ x+-N7
global _start ;entry point (start of execution) l4i51S"
_start: mov edx,len ;string length A^M]vk%dg
mov ecx,msg ;string start RuYIG?J=/
mov ebx,1 ;file handle: stdout er24}G8
mov eax,4 ;sys_write oS$7k3s
fj
int 80h ;kernel system call @"NP`#
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mov ebx,0 ;return value :|kO}NGM
mov eax,1 ;sys_exit &&l
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int 80h ;kernel system call dakHH@Q
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Dks n
x86 CPU,Windows,MASM32 ?xUl_
.386 WqefH{PB
.model flat,stdcall HdtGyh6X0
option casemap:none X@[5nyILf
;Include 文件定义 E8Kk)7
include windows.inc oQh;lb
include user32.inc /9kxDbj
includelib user32.lib Bj4c_YBte
include kernel32.inc 8K9HFT@yV
includelib kernel32.lib 1Q
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;数据段 Xh}q/H<
.data *JX$5bZsI
szCaption db 'A MessageBox!',0 SujEF`"
szText db 'Hello,world!',0 N[O .p]8
;代码段 0
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.code b+:mV7eX
start: IWi0? V
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK ~rO&Y{aG#
invoke ExitProcess,NULL D3aX\ NGP
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> {@L{l1|0
end start T_2'=7
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AWK bj0HAgY@
BEGIN { print "Hello, world!" } d(t)8k$
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BASIC *-]k([wV
传统版BASIC(例如GWBASIC): ApSseBhh
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10 PRINT "Hello, world!" `2U,#nZ 4
20 END o/,%rA4
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或在提示符输入: XdIno}pN
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?"Hello, world!":END (421$w,B%
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现代版BASIC(例如Quick BASIC): anz7ae&P'K
p=[dt
Print "Hello, world!" Ap\]v2G
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以下的语句在Quick BASIC中同样有效: sR PQr?
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? "Hello,world!" k(>J?\iNW
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BCPL FLPN#1
GET "LIBHDR" D.AiqO<z
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LET START () BE }1CO>a<
$( _kOuD}_|
WRITES ("Hello, world!*N") u(r
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$) <5]_u:
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Befunge 0=`aXb-
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Brainfuck IP !zg|c,
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< uTbMp~cYB
+++++++++++++++.>.+++.------.--------.>+.>. Q(8W5Fb?
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#include <stdio.h> jAt65a
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int main(void) ^kB9
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{ Ej VB\6,
printf("Hello, world!\n"); T?__
return 0; )[sSCt]
} i3Nt?FSN
n |,}
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C++ BYS>"
#include <iostream> W\DJXM]b
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int main() +fIyeX
{ KRcg
std::cout << "Hello, world!" << std::endl; [7)#3
return 0; `+r5I5
} Z3T26Uk
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C++/CLI i%B$p0U<
int main() QaEXk5>e
{ ' :]w
System::Console::WriteLine("Hello, world!"); zjJyc?
} `[1]wV5(5@
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C# (C Sharp) Un[#zh<4
class HelloWorldApp `wG&Cy]v
{ 8|Y^z_C
public static void Main() |b7>kM}"
{ mKq9mA"(E
System.Console.WriteLine("Hello, world!"); ]R]X#jm
} ~GY;{
} q+G1#5
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COBOL o_$r*Z|HG
IDENTIFICATION DIVISION. !p9F'7;Y<
PROGRAM-ID. HELLO-WORLD. uTJ?@^nq
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ENVIRONMENT DIVISION. Yc5$915
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DATA DIVISION. I2l'y8)d
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PROCEDURE DIVISION. W]*wxzf!5z
DISPLAY "Hello, world!". $1@{Zz!S
STOP RUN. <?nr"V
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Common Lisp O@Kr}8^,
(format t "Hello world!~%") |)_<