“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。 FFC"rG
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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》。 4WspPHj
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以下是用不同语言写成的Hello World程序的几个例子: 2h=QJgpCG
Ada Z'hHXSXM
with Ada.Text_Io; use Ada.Text_Io; !q]@/<=
procedure Hello is {,;R\)8D
begin 2Kg-ZDK8
Put_Line ("Hello, world!"); p;nRxi7'
end Hello; o'Rr2,lVi
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汇编语言 ^:hI bF4G
NgI n\)
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x86 CPU,DOS,TASM Xg<R+o
MODEL SMALL 7bk=D~/nSg
IDEAL N$&)gI:
STACK 100H W"3YA+qpI
u7>{#]
DATASEG k`aHG8S\
HW DB 'Hello, world!$' RX])#=Cs
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CODESEG #!yW)RG
MOV AX, @data ;q5.\m:
MOV DS, AX gXy'@!
MOV DX, OFFSET HW _|^cudRv
MOV AH, 09H 8%\0v?a5
INT 21H Sm5T/&z
MOV AX, 4C00H gPJZpaS
INT 21H H;DCkVL
END yq6Gyoi<
A
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x86 CPU,GNU/Linux,NASM V'iT>
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). Y%zYO
;Enter this into "hello.asm" then type: nyl[d|pVa
;"nasm -f elf hello.asm" H{1'OC
;"ld hello.o -o hello" MP6Py@J45
;"./hello" &=>|? m8
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section .data ;data section declaration ;ElwF&"!X
msg db 'Hello World!',0AH n[E/O}3& /
len equ $-msg ;string length bI?uV;m>
|~]@hs~
section .text ;code section declaration jA'7@/F/
global _start ;entry point (start of execution) Od]B;&F
_start: mov edx,len ;string length +"?O2PX
mov ecx,msg ;string start :P/0 "
mov ebx,1 ;file handle: stdout _Dq,\}
mov eax,4 ;sys_write ,v@C=4'm
int 80h ;kernel system call SoJ=[5W
goje4;
mov ebx,0 ;return value gt \O
mov eax,1 ;sys_exit wg}rMJoG|
int 80h ;kernel system call 4
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x86 CPU,Windows,MASM32 7;rf$\-&
.386 B;Dl2k^L
.model flat,stdcall ~q,Wj!>Ob
option casemap:none '_fj:dy
;Include 文件定义 h anS8
include windows.inc hd%O\D?
include user32.inc cOoF +hz0O
includelib user32.lib k [eWhdSw
include kernel32.inc >c30kpGg
includelib kernel32.lib pPH"6
;数据段 '7yVvd
.data x%J.$o[<_
szCaption db 'A MessageBox!',0 [}Z!hq
szText db 'Hello,world!',0 jccSjGX@w
;代码段 "lnI@t{o
.code ]w/%>
start: P. Gmj;
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK g;-6Hg'
invoke ExitProcess,NULL 6` 4,
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> phP%
end start =IEei{
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AWK {^A,){uX]
BEGIN { print "Hello, world!" } S4C4_*~Vd
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BASIC u;Rm/.
传统版BASIC(例如GWBASIC): ZOzwO6(_
/
0ra]}[(
10 PRINT "Hello, world!" I4Rd2G_
20 END Wagb|B\
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或在提示符输入: B!AJ*
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?"Hello, world!":END j|w_BO 9
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现代版BASIC(例如Quick BASIC): \F8:6-
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Print "Hello, world!" :Oh*Q(>
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以下的语句在Quick BASIC中同样有效: 2*pNIc
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? "Hello,world!" N?l
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qk_YFR?R
BCPL XFi!=|F
GET "LIBHDR" #4Ltw,b^
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LET START () BE /L;
c -^
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WRITES ("Hello, world!*N") 58[.]f~0
$) hOR1RB
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n _eN|m?@
Befunge a+
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"!dlrow olleH">v W.7XShwd*2
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^_@ Jl-:@[;
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Brainfuck 4;)aGN{e
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< rOTxD/
+++++++++++++++.>.+++.------.--------.>+.>. 3Q2z+`x'
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#include <stdio.h> v{O(}@
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int main(void) k{E!X
{ DgGG*OXY
printf("Hello, world!\n"); EeDK ^W8N
return 0; qs3V2lvYw{
} UUR` m
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C++ {(_>A\zi
#include <iostream> dw3H9(-lp
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int main() yv2wQ_({
{ ;hCUy=m.
std::cout << "Hello, world!" << std::endl; @!,W]?{
return 0; _\u?]YTv
} d#u*NwY}
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C++/CLI QRz5eGpW
int main() w3K>IDWI7
{ +OfHa\Nz
System::Console::WriteLine("Hello, world!"); Fh~
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} !b?`TUt
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C# (C Sharp) ]z"7v
class HelloWorldApp -jcgxQH53
{ p#>d1R1&
public static void Main() MxLi'R=
{ N6w!V]b
System.Console.WriteLine("Hello, world!"); i?]`9 z
} UY/qI%#L#,
} _&K>fy3t&
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COBOL wG",Obja
IDENTIFICATION DIVISION. f_;6uCCO
PROGRAM-ID. HELLO-WORLD. k@9CDwh*s
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ENVIRONMENT DIVISION. %^}|HG*i??
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DATA DIVISION. '=cAdja
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PROCEDURE DIVISION. /(?,S{]
DISPLAY "Hello, world!". u$nYddak
STOP RUN. ^ SW!S_&Z2
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Common Lisp O[\obi"}
(format t "Hello world!~%") ;]Ko7M(4
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DOS批处理 FSA"U9 w<
@echo off aJSBG|IC
echo "Hello, world!" 9
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'I5~<"E
Eiffel baz~luM
class HELLO_WORLD /tu\q
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creation ~s-"u
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make IpKpj"eoLy
feature JXk<t5@D
make is lvk
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local qTrb)95
io:BASIC_IO A)641"[
do 6i'kc3w
!!io );1UbqVPD
io.put_string("%N Hello, world!") 2sYOO>
end -- make <XH,kI(%
end -- class HELLO_WORLD <a)L5<#
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Erlang 'h{| ]
-module(hello). f~v@;/HL
-export([hello_world/0]). nW!pOTJq21
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hello_world() -> io:fwrite("Hello, World!\n"). M}qrF~
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