“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。 M5{#!d}^D
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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》。 Qvp"gut)%X
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以下是用不同语言写成的Hello World程序的几个例子: zRna=h!
Ada M\{n+r-m
with Ada.Text_Io; use Ada.Text_Io; MtkU]XKGT
procedure Hello is &nIu^,.
begin F85_Lz4
Put_Line ("Hello, world!"); '=0}2sF>
end Hello; ;<Q%d~$xy}
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汇编语言 'xH^ksb "
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x86 CPU,DOS,TASM >Y>R1b%
MODEL SMALL JP8}+
IDEAL Et3I(X3
STACK 100H d?7?tL2
`XxnQng
DATASEG &_L%wV|[
HW DB 'Hello, world!$' { b$"SIg1E
vH+g*A0S<
CODESEG tA#Pc6zBuC
MOV AX, @data :|;@FkQ
MOV DS, AX ^}+\ 52w
MOV DX, OFFSET HW >._d2.Q'
MOV AH, 09H Uxjc&o
INT 21H HoPpUq5,
MOV AX, 4C00H SES.&e|!6
INT 21H ?4':~;~
END CyIlv0fd}
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x86 CPU,GNU/Linux,NASM = Pv_,%
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ~
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;Enter this into "hello.asm" then type: y?OP- 27y
;"nasm -f elf hello.asm" \:;MFG'
;"ld hello.o -o hello" irQ'Rm[
;"./hello" L('1NN2
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section .data ;data section declaration AERJ]$\
msg db 'Hello World!',0AH aDdxR:
len equ $-msg ;string length *$=i1w
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section .text ;code section declaration mGE!,!s}
global _start ;entry point (start of execution) h]<S0/
_start: mov edx,len ;string length brA#p>4]Wf
mov ecx,msg ;string start F'XQoZ* 1
mov ebx,1 ;file handle: stdout M">v4f&K1!
mov eax,4 ;sys_write jz8u'y[n7
int 80h ;kernel system call k ]NZ%.
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mov ebx,0 ;return value -m@c{&r
mov eax,1 ;sys_exit d<-f:}^k0
int 80h ;kernel system call t9`{^<LH
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x86 CPU,Windows,MASM32 gBqDx|G
.386 ?L }>9$"
.model flat,stdcall rDFrreQP
option casemap:none ( eKgc
;Include 文件定义 aMI;;iL^
include windows.inc LhO\a
include user32.inc 0%bCP/
includelib user32.lib NQqw|3
include kernel32.inc )M0`dy{1
includelib kernel32.lib 5t:Zp\$+`
;数据段 yX!fj\R
.data == wX.y\.n
szCaption db 'A MessageBox!',0 u[)X="-e#
szText db 'Hello,world!',0 m4m-JD|v
;代码段 58Ibje
.code ?"@Fq2xgB4
start: CE3l_[c
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK O&?i#@5#
invoke ExitProcess,NULL O1v)*&NAI
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ExG(*[l
end start hJM&rM7
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AWK GDLi?3q
BEGIN { print "Hello, world!" } ^(JrOh'
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BASIC x;[ . ZzQ
传统版BASIC(例如GWBASIC): (m3hD)!+y
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10 PRINT "Hello, world!" 4.,EKw3
20 END :-{"9cgFR
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或在提示符输入: O_;BZzT
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?"Hello, world!":END XH%pV
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现代版BASIC(例如Quick BASIC): UIEvwQ
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Print "Hello, world!" \kQ)fk]^
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以下的语句在Quick BASIC中同样有效: P|Aac,nE+^
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? "Hello,world!" |!(8c>]Bo
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DS
BCPL \~#\ [r_
GET "LIBHDR" Z8=?Hu
yepRJ%mp
LET START () BE NAo.79
$( ]KuM's
WRITES ("Hello, world!*N") ^\v]Ltd
$) wKpGJ&
{
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Befunge F/2cQ.u2
"!dlrow olleH">v tz]0F5
, r $S9/
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Brainfuck ~ n<|f
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C -`4]u!A
#include <stdio.h> ZJ{DW4#t
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int main(void) bZ_&AfcB
{ vGyQ306
printf("Hello, world!\n"); ])?dqgwa
return 0; B<s+I#
} Hs)]
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C++ S+06pj4Ie
#include <iostream> |6d:k~p
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int main() lSR\wz*Fk
{ L~ax`i1:"
std::cout << "Hello, world!" << std::endl; XF: wsC
return 0; EG\L]fmD
} U>t:*SNC*
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C++/CLI J.rS@Z`~7
int main() rX$-K\4W
{ R}Zaz3( Hd
System::Console::WriteLine("Hello, world!"); *?Eu{J){7%
} ]yKwH 9sl
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C# (C Sharp) KeyKLkg>
class HelloWorldApp pJg:afCg
{ 0iSNom}m
public static void Main() ub 2'|CYw
{ [%>*P~6nK
System.Console.WriteLine("Hello, world!"); q"Bd-?9
} @dQr^'h
} Yy
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hak#Iz0[C
COBOL g{DOQA
IDENTIFICATION DIVISION. T2-x 1Sw_
PROGRAM-ID. HELLO-WORLD. 6iQqOAG
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ENVIRONMENT DIVISION. _x5-!gK
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DATA DIVISION. NTJ,U2
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PROCEDURE DIVISION. F@/syX;bb5
DISPLAY "Hello, world!". TJ>YJD
STOP RUN. kk126?V]_
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Common Lisp Nj6Np^@sH
(format t "Hello world!~%") p,WBF
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DOS批处理 .~'q
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@echo off >`30 ib
echo "Hello, world!" NO*~C',cI/
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Eiffel N
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class HELLO_WORLD J'cE@(US
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creation @W+8z#xr'
make 21$^k5
feature KI<