“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。 aRg-
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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》。 eH79,!=2
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以下是用不同语言写成的Hello World程序的几个例子: P4ot,Q4
Ada Y{um1)k
with Ada.Text_Io; use Ada.Text_Io; 0Tg/R4dI
procedure Hello is a&4>xZU #
begin ejD;lvf
Put_Line ("Hello, world!"); En-eG37l
end Hello; = DvnfT<
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汇编语言 aFd
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x86 CPU,DOS,TASM 2"JIlS;J}7
MODEL SMALL ym8\q:N(R
IDEAL Y#NlbKkzu
STACK 100H r'k-*I
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DATASEG 8_m dh +
HW DB 'Hello, world!$' ^MDBJ0
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% e:VeP~
CODESEG Pgs4/
MOV AX, @data
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MOV DS, AX ;sCX_`t0E
MOV DX, OFFSET HW >"N \ZC^
MOV AH, 09H 4|7L26,]5
INT 21H 1&U'pp|T
MOV AX, 4C00H rJKX4,M
INT 21H DJT)7l {
END Fl^.J<Dz
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x86 CPU,GNU/Linux,NASM `L7 cS
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). sw8Ic\vT
;Enter this into "hello.asm" then type: o#Rao#bD:
;"nasm -f elf hello.asm"
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;"ld hello.o -o hello" 5qR76iH)/
;"./hello" *cq#>rN
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section .data ;data section declaration b]Oc6zR,,~
msg db 'Hello World!',0AH }a-ikFQ]
len equ $-msg ;string length <`~]P$
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section .text ;code section declaration Vr`UF0_3q
global _start ;entry point (start of execution) z35n3q
_start: mov edx,len ;string length ke'p8Gz
mov ecx,msg ;string start VqbMFr<k
mov ebx,1 ;file handle: stdout 9{?<.%
mov eax,4 ;sys_write 24>{T5E
int 80h ;kernel system call ^L<1S/~)
L&q~5 9
mov ebx,0 ;return value ps_CQh0
mov eax,1 ;sys_exit ib*$3Fn~
int 80h ;kernel system call I&1h/
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x86 CPU,Windows,MASM32 Uw<Lt"ls.
.386 ZO
W{rv]
.model flat,stdcall -GH#nF3G
option casemap:none Xl@nv9m
;Include 文件定义 pcoJ\&&W
include windows.inc /QD}_lh;,
include user32.inc 0 l
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includelib user32.lib ^kt#[N
include kernel32.inc 6@; w%Ea
includelib kernel32.lib X}h{xl
;数据段 SDcD(G
.data wC..LdSR
szCaption db 'A MessageBox!',0 d cYUw]
szText db 'Hello,world!',0 (~zdS.
;代码段 (gs"2
.code gP^'4>Jr
start: ,t(y~Z
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invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK rQ@,Y"
invoke ExitProcess,NULL |o|0qG@g
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ,r:.
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end start S!up2OseW
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BEGIN { print "Hello, world!" } oC>^V5
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BASIC |P>>
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传统版BASIC(例如GWBASIC): 2pxl!
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10 PRINT "Hello, world!" VL7zU->
20 END aG`G$3 _wx
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或在提示符输入: FwmE1,
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?"Hello, world!":END =/Vr,y$
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现代版BASIC(例如Quick BASIC): gj$gqO`B
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Print "Hello, world!" H:a(&Zb
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以下的语句在Quick BASIC中同样有效: {SCwi;m
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? "Hello,world!" #eR*|W7o
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BCPL rM_8piD
GET "LIBHDR" ^mkplp
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LET START () BE 3:dQN;=
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WRITES ("Hello, world!*N") w3fi2B&q
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Befunge -8#Of)W
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C ;_1D-Mf
#include <stdio.h> coyy T
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int main(void) p@YU7_sF^!
{ GwxfnCKi9
printf("Hello, world!\n"); QVQe9{ "0
return 0; Ym2![FC1
} 3'
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C++ X<vv:
#include <iostream> %dhnp9'
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int main() v>;6pcp[F
{ AW%^Xt
std::cout << "Hello, world!" << std::endl; x_s9DkX
return 0; /2~qm/%Q
} f0O"Hm$Z
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C++/CLI 5ju\!Re3X
int main() =Pd3SC})6V
{ rcY[jF
System::Console::WriteLine("Hello, world!"); [8l8m6
} W7_X=>l
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C# (C Sharp) QUH USDT
class HelloWorldApp <t.yn\G-w
{ kOs_]
public static void Main() @m<xpel
{ 3l-8TR
System.Console.WriteLine("Hello, world!"); bmGIxBRq
} Jx.Jx~
} ")i4w{_y
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COBOL %f*8JUE16
IDENTIFICATION DIVISION. jLM1~`&
PROGRAM-ID. HELLO-WORLD. Dc}-wnga
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ENVIRONMENT DIVISION. !c[?$#W4
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DATA DIVISION. SdeKRZ{o
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PROCEDURE DIVISION. l> W?XH
DISPLAY "Hello, world!". ?|w>."F
STOP RUN. d3St Z~&r!
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Common Lisp x32hO;
(format t "Hello world!~%") #||^l_
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DOS批处理 P>9F(#u_(F
@echo off MRV4D<NQ
echo "Hello, world!" L 1H!o!*
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Eiffel Wj(O_2
class HELLO_WORLD @aAB#,
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creation -B* = V
make ;%0$3a
feature x&@. [FJhO
make is zgI!S6q
local 1I{vBeMj
io:BASIC_IO |Rd?s0u
do _)"-zbh}{
!!io SDwTGQ/0
io.put_string("%N Hello, world!") ^KM' O8
end -- make -Wd2FD^x
end -- class HELLO_WORLD &CpxD."8x
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Erlang "jb`KBH%"
-module(hello). M%92^;|`
-export([hello_world/0]). #^|y0:
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hello_world() -> io:fwrite("Hello, World!\n"). EZ:pcnL{
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