“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。 rr )/`Kmv%
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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》。 |j#
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以下是用不同语言写成的Hello World程序的几个例子: :rmauKR
Ada Yb9cW\lr
with Ada.Text_Io; use Ada.Text_Io; Zs73
ad
procedure Hello is 8A4TAT4,
begin `^e*T'UPl
Put_Line ("Hello, world!"); XtzOFx/
end Hello; +{*)}[w{x
mu>] 9ZW
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汇编语言 ;@4sd%L8V
{*fUJmao"
x86 CPU,DOS,TASM u\3ZIb
MODEL SMALL +f]u5p[
IDEAL Da CblX
STACK 100H y#e ?iE@
S}mm\<=1
DATASEG Q@Dkl
F
HW DB 'Hello, world!$' WKOI\
RNe9h lr
CODESEG 9tAE#A
MOV AX, @data tNB%eb{
MOV DS, AX |?yE^$a
MOV DX, OFFSET HW ]CIe~q
MOV AH, 09H Iu%^*K%
INT 21H cdDY]"k
MOV AX, 4C00H 1VGpq-4*j
INT 21H RUqO!s~#rY
END *?p
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x86 CPU,GNU/Linux,NASM ZIe +
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). <OIUyZS
;Enter this into "hello.asm" then type: $)f"K
;"nasm -f elf hello.asm" i0b.AA
;"ld hello.o -o hello" \#2
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;"./hello" [\a:4vDAbi
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section .data ;data section declaration @o60c
msg db 'Hello World!',0AH ?0uOR*y'
len equ $-msg ;string length (HPz
)# p.`J
section .text ;code section declaration .Nk}Z9L]k
global _start ;entry point (start of execution) #1B}-PGCm
_start: mov edx,len ;string length Enu!u~1]F
mov ecx,msg ;string start F$[)Bd /"
mov ebx,1 ;file handle: stdout v`
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mov eax,4 ;sys_write W oWBs)E
int 80h ;kernel system call FN>L7
*,0
df^0{gNHx
mov ebx,0 ;return value m[W/j/$A+x
mov eax,1 ;sys_exit ;*nh=w
int 80h ;kernel system call gU+ss
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x86 CPU,Windows,MASM32 "~_$T@^k>
.386 pL8H8kn
.model flat,stdcall ~Po\ En
option casemap:none <o~t$TH
;Include 文件定义 &{BBxv)y
include windows.inc ?THa5%8f
include user32.inc J}:&eS
includelib user32.lib ed=n``P~}
include kernel32.inc IeH^Wm&^
includelib kernel32.lib `|&\e_"DE
;数据段 s:3aRQ%
.data g%ZdIKj!
szCaption db 'A MessageBox!',0 Bj; [
szText db 'Hello,world!',0 (x}A_i
;代码段 .l7j8}
.code d3og?{i<}&
start: Gl.?U;4Z
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK ]9#CVv[rq
invoke ExitProcess,NULL 1]Gf)|
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> o
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end start 1k$2LQ
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BEGIN { print "Hello, world!" } Kq$:\B)<c
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BASIC #]k0Z~Bl
传统版BASIC(例如GWBASIC): MST:.x ;
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10 PRINT "Hello, world!" JIVo=5c}
20 END +I*k0"gj6
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或在提示符输入: _cR6ik zW(
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?"Hello, world!":END 3T"2S[gT
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现代版BASIC(例如Quick BASIC): 92s4u3L;
BO[+E'2
Print "Hello, world!" @8QFP3\1
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以下的语句在Quick BASIC中同样有效: "tfn?n0
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? "Hello,world!" [|y`y%
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BCPL K/!/M%GB6
GET "LIBHDR" 3Wjq >\
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LET START () BE #c6ui0E%;t
$( ~azF+}x90N
WRITES ("Hello, world!*N") 43+EX.c
$) f#*h^91x
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Befunge C_6GOpl
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, 65'`uuPx
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#include <stdio.h> ll^Th >
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int main(void) sGXp}{E9
{ f1)HHUB
printf("Hello, world!\n"); W/#KX}4
return 0; Kl4isGcr]
} 7h(HG?2Y
) ~ l\
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C++ 0eQ~#~j&
#include <iostream> += X).X0K
v]B0!k&4.
int main() jVLY!7Z4
{ ='7er.~\
std::cout << "Hello, world!" << std::endl; K#_~
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return 0; :&xz5c`"04
} 83mlZ1jQz
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C++/CLI "9c.C I
int main() D2Vb{ %(4.
{ Ask' !
System::Console::WriteLine("Hello, world!"); |z.Gh1GCy
} $ \? N<W
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i}.{m Et
C# (C Sharp) qzuQq94k
class HelloWorldApp pWWL{@ J
{ %4?SY82
public static void Main() ZC3tbhV
{ <m?GJuQ'
System.Console.WriteLine("Hello, world!"); *LY~l
} L!CX&
} hB|H9+
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COBOL kWzuz#
IDENTIFICATION DIVISION. jlYD~)
PROGRAM-ID. HELLO-WORLD. FZ[@])B
X=rc3~}f
ENVIRONMENT DIVISION. '"!z$i~G=
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DATA DIVISION. u5xU)l3
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PROCEDURE DIVISION. <_##YSGh,
DISPLAY "Hello, world!". 8QkWgd7y
STOP RUN. kvMk:.
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Common Lisp -@EBbM&
(format t "Hello world!~%") zvek2\*rO
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