“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。 CvkZ<i){
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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》。 meJ%mY
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以下是用不同语言写成的Hello World程序的几个例子: csK;GSp}
Ada Qze.1h
with Ada.Text_Io; use Ada.Text_Io; 3&`LVhx
procedure Hello is fD:BKJQ
begin -?%81 z.Qq
Put_Line ("Hello, world!"); d0U-:S-
end Hello; !DU4iq_.
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汇编语言 ;8Qx~:c
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x86 CPU,DOS,TASM \%BII>VS
MODEL SMALL m-u3 ^\'
IDEAL :LrB9Cf$n
STACK 100H %7}ibz4iF
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DATASEG .s-V:k5
HW DB 'Hello, world!$' E!"N}v
lf2Q
CODESEG e)BU6m%
MOV AX, @data ~S\y)l\wZ
MOV DS, AX 6> DmcG:.
MOV DX, OFFSET HW xky +"
MOV AH, 09H Mj!g1Q
INT 21H RwyX,|
MOV AX, 4C00H CNMcQP
INT 21H ){}1u ?
END H6/n
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Q h~
x86 CPU,GNU/Linux,NASM cZR9rnZT
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). , ;$SRQ.
;Enter this into "hello.asm" then type: @h=r;N#/`P
;"nasm -f elf hello.asm" |X47&Y
;"ld hello.o -o hello" %^KNY ;E
;"./hello" [%LIW%t|
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section .data ;data section declaration pE4yx5r5
msg db 'Hello World!',0AH h[(.
len equ $-msg ;string length 2]:Z7Ji
(Q(=MEar
section .text ;code section declaration IoKN.#;^
global _start ;entry point (start of execution) _jWGwO
_start: mov edx,len ;string length taBCE?{
mov ecx,msg ;string start
ihp>cl?
mov ebx,1 ;file handle: stdout *e,GXU@
mov eax,4 ;sys_write Gr&YzbSX
int 80h ;kernel system call N!lQ;o'
Wj INY
mov ebx,0 ;return value Q@(tyW+8U@
mov eax,1 ;sys_exit Q ym=L(X
int 80h ;kernel system call ,z5B"o{Et
L)"E _
JRr'81\
x86 CPU,Windows,MASM32 h?7@]&VJ
.386 |SX31T9rG
.model flat,stdcall 4{6XZ_J1
option casemap:none wX+KW0|>
;Include 文件定义 +/U6p!
include windows.inc M$Or|HTG
include user32.inc fx=HK t
includelib user32.lib IeT1Jwe
include kernel32.inc ~O8Xj6
includelib kernel32.lib b wqd`C
;数据段 sjj,q?
.data d$5\{YLy
szCaption db 'A MessageBox!',0 L %20tm
szText db 'Hello,world!',0 GUcGu5tw:
;代码段 Q@ghQGn#
.code x5(B(V@b
start: w%?6s 3
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK g9G
8;
invoke ExitProcess,NULL |R3A$r#-
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> !n3J6%b9y/
end start \1nj=ca?
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jrN"en
AWK B&Iy_;
BEGIN { print "Hello, world!" } zlhI \jRdc
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BASIC m\eYm;RVj
传统版BASIC(例如GWBASIC): oGKk2oP
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10 PRINT "Hello, world!" u.ub:
20 END cz;gz4d8
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或在提示符输入: }ZB:nnG
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?"Hello, world!":END X;QhK] Z
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现代版BASIC(例如Quick BASIC): ;@s'JSPt
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Print "Hello, world!" IRK(y*6
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以下的语句在Quick BASIC中同样有效: 7q@>d(xho
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? "Hello,world!" )uazB!X
Sr4/8BZ
~ L?q.*q
BCPL !9g>/9h
GET "LIBHDR" j6#RV@ p`
hM[QR'\QS
LET START () BE $;As7MI
$( 9 #)&
WRITES ("Hello, world!*N") 7thB1cOJ
$) fl*>m,
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Befunge w6G<&1iH
"!dlrow olleH">v {hi'LA-4@
, o06vC
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Brainfuck YdF\*tZ
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< ~O~R,h>
+++++++++++++++.>.+++.------.--------.>+.>. U( (F<
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#include <stdio.h> G21cJi*
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int main(void) a[A*9%a
{ /5r!Fhx
printf("Hello, world!\n"); yQdoy^d/4
return 0; I1fUV72
} e> Q_&6L
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C++ [.LbX`K:
#include <iostream> B^lm'/,@
HV\l86}
int main() u
ioBId
{ 09w<@#
std::cout << "Hello, world!" << std::endl; (@ixV$Y
return 0; N3?@CM^hHw
}
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C++/CLI Qv/Kb w
N{
int main() 6R';[um?q
{ d'*:2;)g^
System::Console::WriteLine("Hello, world!"); (f>~+-IL
} p}9bZKyf
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C# (C Sharp) L_QJS2
class HelloWorldApp Av"^uevfs
{ $Y&rci]
public static void Main() ht5eb"c+8
{ (^;Fyf/
System.Console.WriteLine("Hello, world!"); cUK9EOPe
} L>{p>
} e sDd>W
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0pl |
COBOL OM 4,Sevk
IDENTIFICATION DIVISION. ~CQTPR
PROGRAM-ID. HELLO-WORLD. >Z&Y!w'A|u
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ENVIRONMENT DIVISION. 1Aw/-FxJ
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DATA DIVISION. jw$[b=sa
w//L2.
PROCEDURE DIVISION. 1k?k{Ri
DISPLAY "Hello, world!". iES?}K/q
STOP RUN. a@}A;y'd
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