“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。 Qkc9X0J!
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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》。 3#eAXIW[
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以下是用不同语言写成的Hello World程序的几个例子: +x<OyjY5?]
Ada L^K,YlNBR
with Ada.Text_Io; use Ada.Text_Io; bgkBgugZhX
procedure Hello is :m>Vp
begin _9?v?mL5;
Put_Line ("Hello, world!"); 5f2=`C0_
end Hello; }'Ph^
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汇编语言 ^AERGB\36
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x86 CPU,DOS,TASM >;%LW}
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MODEL SMALL b1%w+* d<z
IDEAL [ u ^/3N
STACK 100H ja(ZJ[<`
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DATASEG dV-6 l6
HW DB 'Hello, world!$' T&}KUX~Q/
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CODESEG WC
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MOV AX, @data ,k(B>O ~o
MOV DS, AX <&bBE"U4
MOV DX, OFFSET HW (0rcLNk{|
MOV AH, 09H 8G3.bi'q
INT 21H
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MOV AX, 4C00H lI@Z)~
INT 21H '$5d6?BC`3
END :)FNhx3
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x86 CPU,GNU/Linux,NASM }9FWtXAU^1
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). D[4%CQ1m
;Enter this into "hello.asm" then type: K??jV&Xor
;"nasm -f elf hello.asm" fA=Lb^,M
;"ld hello.o -o hello" ezri9\Ju
;"./hello" Q5_ ,`r`
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section .data ;data section declaration w{N8Y~O
msg db 'Hello World!',0AH <N3~X,ch
len equ $-msg ;string length V}Oz!
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section .text ;code section declaration }G!'SZ$F 5
global _start ;entry point (start of execution) 'z@]hm#
_start: mov edx,len ;string length -lXQQ#V
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mov ecx,msg ;string start C'jCIL
mov ebx,1 ;file handle: stdout CIRMAX
mov eax,4 ;sys_write f 0~Z@\
int 80h ;kernel system call 7e D`
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mov ebx,0 ;return value a.ijc>K
mov eax,1 ;sys_exit GoPMWbI7
int 80h ;kernel system call @gQ?cU 7
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x86 CPU,Windows,MASM32
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.386 ,'sDauFn
.model flat,stdcall _ozg=n2(
option casemap:none $_e{Zv[
;Include 文件定义 ]/AU_&
include windows.inc kV3LFPf>0
include user32.inc }r"E\~E
includelib user32.lib Ok}e|b[D
include kernel32.inc P]L%$!g
includelib kernel32.lib $#wi2Ve=6b
;数据段 )QmmI[,tq
.data gV*4{d`
szCaption db 'A MessageBox!',0 -w'g0/fD
szText db 'Hello,world!',0 '
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;代码段 TGjxy1A
.code $}EARW9
start: n"Jj'8k
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK VW^q|B yB
invoke ExitProcess,NULL ~4c,'k@
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> YfNN&G4_
end start Zjs,R{
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AWK *$/Go8t4u
BEGIN { print "Hello, world!" } $jBi~QqOf
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BASIC FRQkD%k
传统版BASIC(例如GWBASIC): .mOm@<Xdg
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10 PRINT "Hello, world!" qR
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20 END 1k"i"kRM
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或在提示符输入: h,K&R8S
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?"Hello, world!":END ]eTp?q%0
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现代版BASIC(例如Quick BASIC): 0\eSiXs
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Print "Hello, world!" x/0x&la
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以下的语句在Quick BASIC中同样有效: =CL,+
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? "Hello,world!" w2U]RI\?2
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BCPL ONc#d'-L
GET "LIBHDR" 8zwH^q[`r
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LET START () BE .li)k[] ts
$( #X6=`Xe#
WRITES ("Hello, world!*N") m5hu;>gt
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Befunge RaC6RH
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#include <stdio.h> `"$9L[>
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int main(void) XU}" h&>
{ T8j<\0WW
printf("Hello, world!\n"); V7+/|P_
return 0; 5+)_d%v=6!
} O /h1ew
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C++ )EN,Ry
#include <iostream> 26j-1c!NGd
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int main() 4@-Wp]
{ "7?x aGh8
std::cout << "Hello, world!" << std::endl; 1+tPd7U
return 0; ^SwU]e
} @*$"6!3s5
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C++/CLI m# ^).+
int main() ork{a.1-_w
{ MOIVt) ZY
System::Console::WriteLine("Hello, world!"); EV~?]Kt~
} Q%t
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C# (C Sharp) *#'&a(hB!
class HelloWorldApp >SD?MW1E
{ .O
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public static void Main() 1ay{uU!EL
{ #Vm)wH3
System.Console.WriteLine("Hello, world!"); R7x*/?
} }5?|iUH|
} b+71`aD0
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COBOL WVL\|y728s
IDENTIFICATION DIVISION. ,w_C~XN$t
PROGRAM-ID. HELLO-WORLD. g;y*F;0@
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ENVIRONMENT DIVISION. iM]&ryGB