“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。 W7 T2j+]
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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》。 a'my0m
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以下是用不同语言写成的Hello World程序的几个例子: v}^uN+a5
Ada v?DA>
with Ada.Text_Io; use Ada.Text_Io; "(\]-%:7
procedure Hello is Q 9JT6
begin
/zir$
Put_Line ("Hello, world!"); ( M3-S5
end Hello; 7#26Smv
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汇编语言 2>Kn'p
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x86 CPU,DOS,TASM P2U [PO
MODEL SMALL ?V)M!
IDEAL I[LHJ4
STACK 100H TP=#U^g*
5 ^tetDz}
DATASEG H|;BT
HW DB 'Hello, world!$' 3J^'x
f kdJgK
CODESEG %b ^.Gw\L
MOV AX, @data {8~xFYc:
MOV DS, AX !OR%AdxB
MOV DX, OFFSET HW 0INlo
MOV AH, 09H M8FC-zFs
INT 21H DCSTp2
MOV AX, 4C00H `hU2Ss~
INT 21H Iw</X}#\
END Qu|<1CrZj]
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x86 CPU,GNU/Linux,NASM dJmr!bN\;
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). gBXbB9
;Enter this into "hello.asm" then type: Gii1|pLZ1
;"nasm -f elf hello.asm" x.U:v20`
;"ld hello.o -o hello" w"E.Va
;"./hello" ?)/&tk9.n
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section .data ;data section declaration mH4Jl1S&
msg db 'Hello World!',0AH yd`f<Hr<m
len equ $-msg ;string length Jn1(-
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section .text ;code section declaration 2&:w_KJ
global _start ;entry point (start of execution) _^] :tL6
_start: mov edx,len ;string length +H3;{ h9,
mov ecx,msg ;string start XZpF<7l
mov ebx,1 ;file handle: stdout %4h$/~
mov eax,4 ;sys_write f\vg<lca
int 80h ;kernel system call 3*<~;Z' z4
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mov ebx,0 ;return value >iWw
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mov eax,1 ;sys_exit u-X P`
int 80h ;kernel system call T_4y;mf!@O
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x86 CPU,Windows,MASM32 |z.Z='`
.386 :*E#w"$,j
.model flat,stdcall koOp:7r
option casemap:none kQ
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;Include 文件定义 1}I%yOi)
include windows.inc UE%~SVi.#
include user32.inc lRA!
includelib user32.lib 83gp'W{|
include kernel32.inc fGDjX!3-S
includelib kernel32.lib *Zk$P.]
;数据段 /AUXO]
.data `F' >NNY
szCaption db 'A MessageBox!',0 !>QD42
szText db 'Hello,world!',0 |),3`*N
;代码段 pU5t,
.code /m+\oZ
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start: PQ`~qM:3st
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK N:7;c}~
invoke ExitProcess,NULL mM;p 7
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;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> B)(ZRH
end start xrCb29{
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BEGIN { print "Hello, world!" } 8>~\R=SC
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BASIC |H@1g=q
传统版BASIC(例如GWBASIC): YW UCrnr
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10 PRINT "Hello, world!" d^YM@>%
20 END N'e3<
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或在提示符输入: #~>ykuq
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?"Hello, world!":END D= LLm$y
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现代版BASIC(例如Quick BASIC): 58.b@@T
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Print "Hello, world!" XCU>b[Cj,
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以下的语句在Quick BASIC中同样有效: I^yInrRh5
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? "Hello,world!" ~xP4}gs1
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BCPL vB9v8@[I&
GET "LIBHDR" }O7b&G:nW
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LET START () BE ]&RC<imq
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WRITES ("Hello, world!*N") nVVQ^i}`G
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Befunge .W)%*~ O!;
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C 3"ii_#1
#include <stdio.h> L]C|&KP
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int main(void) m$X0O_*A
{ ev_4!+ko
printf("Hello, world!\n"); /T_@rm
return 0; ?onTW2cG;
} {!`0i
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C++ sAG#M\A6
#include <iostream> )Kw
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int main() ^t{2k[@
{ .0b$mSV[
std::cout << "Hello, world!" << std::endl; KDODUohC
return 0; d?uN6JH9
} ogrh"
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C++/CLI E0Y>2HOuL
int main() O*8.kqlgt
{ `Z3p( G
System::Console::WriteLine("Hello, world!"); A*r6
} L\u6EMyV
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C# (C Sharp) d/fg
class HelloWorldApp n\ yDMY
{ zFn-VEJ)
public static void Main() `(rnD
{ CPto?=*A
System.Console.WriteLine("Hello, world!"); fi6i{(K
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} t69C48}15
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COBOL xKl!{A9$w
IDENTIFICATION DIVISION. YF]W<ZpY
PROGRAM-ID. HELLO-WORLD. k_^|%xJ
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ENVIRONMENT DIVISION. $Z!$E,@c
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DATA DIVISION. GRt1]%l#$
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PROCEDURE DIVISION. #@*;Y(9Ol
DISPLAY "Hello, world!". X
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STOP RUN. EO<{Bj=2
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Common Lisp sSM^net0
(format t "Hello world!~%") ^`96L
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DOS批处理 |N{?LKR
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@echo off ^"g # !
echo "Hello, world!" ]W-7 U_
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Eiffel -jv%BJJlX
class HELLO_WORLD '_nJ DM
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creation |)7dh B
make ? ^EB"{
feature zj ?^,\{A
make is Y_H|Fl^
local QL<uQ`>(
io:BASIC_IO &g{b5x{iD
do Q9UBxpDV:
!!io b R6g^Yf
io.put_string("%N Hello, world!") -27uh
end -- make Dd(#
end -- class HELLO_WORLD VeJM=s.y7
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