“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。 6jRUkI-!
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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》。 ?`oCc[hY
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以下是用不同语言写成的Hello World程序的几个例子: W&U
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Ada \HzI*|*A
with Ada.Text_Io; use Ada.Text_Io; fi2@`37PM
procedure Hello is n>Rt9
begin x@I(G "
Put_Line ("Hello, world!"); 6BJPQdqSl
end Hello; _"PTO&E
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汇编语言 U[a;eOLx
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x86 CPU,DOS,TASM T`;>Kq:s
MODEL SMALL JWa9[Dj
IDEAL x"Hi!h)v
STACK 100H ^/3R/;?
0r?}LWjf
DATASEG *\Y \$w
HW DB 'Hello, world!$' I]]3=?Y
1>"K<6b+
CODESEG A&2 )iQ
MOV AX, @data CE$c/d[N.
MOV DS, AX wPn#>\/L
MOV DX, OFFSET HW <.0-K_
MOV AH, 09H %s;#epP$
INT 21H XM$HHk}L;
MOV AX, 4C00H Q`qHzb~%
INT 21H @eRR#S
END l!plw,PYC
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x86 CPU,GNU/Linux,NASM X;7gh>Q'4
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). &cSTem
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;Enter this into "hello.asm" then type: 9ZL3p!
;"nasm -f elf hello.asm" @LS*WJ< w-
;"ld hello.o -o hello" Wb] ha1$
;"./hello" DAG2pc8zA
?=B$-)/
section .data ;data section declaration $#g1Mx{
msg db 'Hello World!',0AH d7y`AS@q6
len equ $-msg ;string length Zu\(XN?62
;[]{O5TB
section .text ;code section declaration :!M/9D*}0
global _start ;entry point (start of execution) #ra~Yb-F
_start: mov edx,len ;string length 2<Tbd"x?
mov ecx,msg ;string start coHzbD~#H
mov ebx,1 ;file handle: stdout )v-sde\
mov eax,4 ;sys_write +-=w`
int 80h ;kernel system call +zQ
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1 f ]04TI
mov ebx,0 ;return value Fg)Iw<7_2
mov eax,1 ;sys_exit M1^?_;B
int 80h ;kernel system call u=h:d+rq@
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x86 CPU,Windows,MASM32 9Xt5{\PJ
.386 ErK5iTSD
.model flat,stdcall -aDGXQM{~
option casemap:none u%<Je
;Include 文件定义 ty|E[Ez1
include windows.inc [];*9vxW
include user32.inc ab!,)^
includelib user32.lib ?GPTJ#=j=]
include kernel32.inc 31\l0Jg
includelib kernel32.lib :b[
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;数据段 8<Cu S
.data RU3:[(7
szCaption db 'A MessageBox!',0 37DyDzW)'
szText db 'Hello,world!',0 5A,@$yp+
;代码段 sas}k7m"
.code e`%U}_[d
start: @vdBA hXk
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 'c3P3`o,;
invoke ExitProcess,NULL UI}v{05]
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> xJtblZ1sr
end start Z,%^BAJ
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AWK V&U1WV/
BEGIN { print "Hello, world!" } oa(R,{_*q
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BASIC B#Cb`b"
传统版BASIC(例如GWBASIC): o(GXv3L
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10 PRINT "Hello, world!" tHAr9
20 END P;_}nbB
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或在提示符输入: '4-J0S<<_
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?"Hello, world!":END a *?bnw?
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现代版BASIC(例如Quick BASIC): _m .u@+g
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Print "Hello, world!" 4D+S\S0bk
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以下的语句在Quick BASIC中同样有效: LpCJfQ
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? "Hello,world!" ~6YTm6o
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BCPL A[W3.$s
GET "LIBHDR" h9<*+T
/-%0y2"7
LET START () BE D d['e
$( $gZC"~BR
WRITES ("Hello, world!*N") qiEw[3Za]'
$) gY!+x=cx0
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:g&9v_}&K{
Befunge s{g^K#BoFi
"!dlrow olleH">v R( 2,1f=d
, vwF#;jj\
^_@ O_vCZW
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++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< 'PO+P~|oa&
+++++++++++++++.>.+++.------.--------.>+.>. }4$k-,1S
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C dgbqMu"
#include <stdio.h> -hy`Np
%=w@c
int main(void) o2'^MxKb T
{ su2|x
printf("Hello, world!\n"); E4}MU}C#[
return 0; JSp V2c5Q
} J}zN]|bz
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C++ Qqm$Jl!
#include <iostream> 9:\#GOg
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int main() vZ6_/ew8
{ b79z<D
std::cout << "Hello, world!" << std::endl; y [jck:
return 0; !3*:6
} }c]u'a!4
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C++/CLI ta
int main() b^s>yN
{ tNbL)
System::Console::WriteLine("Hello, world!"); A_pcv7=@
} 0?80V'
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C# (C Sharp) ov xX.hO
class HelloWorldApp x<=<Lx0B;
{ Lb=4\ _
public static void Main() @Jh;YDr`A
{ ]DJ]L=T7
System.Console.WriteLine("Hello, world!"); 5f}GV0=n
} |V
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} k $d+w][
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COBOL 6'a1]K
IDENTIFICATION DIVISION. yt5'2!jc
PROGRAM-ID. HELLO-WORLD. `VL<pqPP
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ENVIRONMENT DIVISION. &al\8
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DATA DIVISION. zNh$d;(O$^
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PROCEDURE DIVISION. :k&5Z`>)
DISPLAY "Hello, world!". _GtG8ebr
STOP RUN. lm[LDtc
8|2I/#F}]
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Common Lisp 4xsnN@b
(format t "Hello world!~%") r1]DkX <6
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DOS批处理 GiS{=+=5
@echo off fa#5pys
echo "Hello, world!" U#gv ~)\k
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Eiffel ,!I'0x1OR
class HELLO_WORLD r>kDRIHB
i-W!`1LH'
creation 6$'0^Ftm'
make Qh{]gw-6
feature ".|?A9m_
make is XKEbK\
local @7z_f!'u
io:BASIC_IO W^T6^q5;H
do Hphfqdh0`
!!io Ks/Uyu. X
io.put_string("%N Hello, world!") *#&s+h,^
end -- make wf&1,t3Bgn
end -- class HELLO_WORLD <