“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。
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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》。 8:thWGLN
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以下是用不同语言写成的Hello World程序的几个例子: }"_j0ax
Ada :$g8Zm,y
with Ada.Text_Io; use Ada.Text_Io; DI1(`y
procedure Hello is __I/F6{ 9V
begin ^:u?ye;
Put_Line ("Hello, world!"); *5OCqU+g
end Hello; Cqxv"NN
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汇编语言 gsPl _
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x86 CPU,DOS,TASM P=`1 rjPE
MODEL SMALL eEl.. y
IDEAL T5|c$doQ
STACK 100H a}gkT]
8;8c"'Mn
DATASEG q'G,!];qL
HW DB 'Hello, world!$' \NK-L."[
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CODESEG hat>kXm2K
MOV AX, @data `uo,__y
MOV DS, AX ;AIc?Cg
MOV DX, OFFSET HW y&oNv
xG-
MOV AH, 09H tmJgm5v
INT 21H c|AtBgvf
MOV AX, 4C00H WKl+{e
INT 21H TWd;EnNM
END g=l:cVr8y
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x86 CPU,GNU/Linux,NASM yz\c5
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). !kL> ,O>/
;Enter this into "hello.asm" then type: <
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;"nasm -f elf hello.asm" 2p!"p`b~
;"ld hello.o -o hello" W^\d^)
;"./hello" `t(D!
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section .data ;data section declaration }BJX/, H,
msg db 'Hello World!',0AH X!tf#tl
len equ $-msg ;string length wRtZ`o
/ i_ @
section .text ;code section declaration rwE%G>Vb
global _start ;entry point (start of execution) =IjQ4 0W
_start: mov edx,len ;string length z@Hp,|Vy[
mov ecx,msg ;string start [/ M`
mov ebx,1 ;file handle: stdout DmqSQA
mov eax,4 ;sys_write . +
int 80h ;kernel system call PftxqJz
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mov ebx,0 ;return value e3(/qMl
mov eax,1 ;sys_exit 6l\FIah@
int 80h ;kernel system call :G5RYi
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'5KeL3J;
x86 CPU,Windows,MASM32 atF?OP|{,w
.386 89~ =eY
.model flat,stdcall |=dC
)Azs
option casemap:none D@oCP =m<
;Include 文件定义 {ZsdLF#
include windows.inc 0?0Jz
include user32.inc 'CR)`G_'[
includelib user32.lib ve6w<3D@
include kernel32.inc Wu1{[a|
includelib kernel32.lib ]J7Qgp)i
;数据段 9`Q<Yy"du
.data $s5a G)?7
szCaption db 'A MessageBox!',0 ^U[D4UM
szText db 'Hello,world!',0 :dI\z]Y(
;代码段 CC^E_j T
.code %^]?5a!
start: k1
-~
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK #Q"O4 b:8
invoke ExitProcess,NULL w
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;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> %A/_5;PZ/
end start 1|r,dE2k9
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AWK ;]sYf
BEGIN { print "Hello, world!" } eqAW+Ptx
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BASIC qJ4T]FVN
传统版BASIC(例如GWBASIC): `D$Jv N
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10 PRINT "Hello, world!" O$u"/cwe*
20 END O1&b]C#
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或在提示符输入: >Z.\J2wM<j
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?"Hello, world!":END KhbYr$
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现代版BASIC(例如Quick BASIC): ~]C%/gEh
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Print "Hello, world!" V5F%_,No
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以下的语句在Quick BASIC中同样有效: v
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? "Hello,world!" PQN@JaD
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-_C#wtC
BCPL Gq<X4C#|
GET "LIBHDR" D]G)j
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LET START () BE jnB~sbyA
$( KJ2Pb"s
WRITES ("Hello, world!*N") :#k &\f-Y
$) `o]g~AKX
#|GSQJ$F)`
e= vsuqGT
Befunge eB>s=}|
"!dlrow olleH">v ew _-Eb
, ?<Wb@6kh`
^_@ w;UqEC V
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Brainfuck yXI >I
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+++++++++++++++.>.+++.------.--------.>+.>. ",aTWQgN
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C GeszgtK{T
#include <stdio.h> >MK>gLg}!
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int main(void) 7>XDNI
{ c;0Vs,DUmG
printf("Hello, world!\n"); j>Iaq"
return 0; "tjLc6Xl^
} Wq*b~Lw
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C++ sJwyj D$b
#include <iostream> /sM~Uq?
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int main() @%k}FL=:t(
{ DejA4XdW
std::cout << "Hello, world!" << std::endl; oi}i\:
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return 0; ~qe%Yq
} 7dsefNPb
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C [/dH
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C++/CLI vAY,E=&XvM
int main() Y!iZW
{ z#BR5jF
System::Console::WriteLine("Hello, world!"); }_=eT]
} su*Pk|6%
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C# (C Sharp) s .Wdxh
class HelloWorldApp gs!(;N\j|
{ w 4[{2
public static void Main() !*- >;:9B
{ 4DZ-bt'
System.Console.WriteLine("Hello, world!"); zOg7raIa
} Y0?5w0{
} ()&~@1U
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COBOL {uzf"%VtP
IDENTIFICATION DIVISION. r.7$&BCng
PROGRAM-ID. HELLO-WORLD. )95f*wte
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ENVIRONMENT DIVISION. W9NX=gE4
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DATA DIVISION. rE@T79"
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PROCEDURE DIVISION. ;WR,eI..
DISPLAY "Hello, world!". Ft}@1w5
STOP RUN. {s. = )0V
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Common Lisp tcxcup%
(format t "Hello world!~%") *z@>!8?
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DOS批处理 H;RwO@v
@echo off N7e"@Ic
echo "Hello, world!" 03C0L&
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7
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Eiffel / m=HG^!
class HELLO_WORLD c38D}k^):
4?B\O`sy.
creation eM8}X[
make '-zD
feature dAuJXGo
make is 82l~G;.n3
local &jmRA