“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。 DV{Qbe#In
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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》。 j31
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以下是用不同语言写成的Hello World程序的几个例子: f0MHh5
Ada R"=G?d)
with Ada.Text_Io; use Ada.Text_Io; @qg=lt|(F
procedure Hello is 1fEV^5I
begin V"T;3@N/4
Put_Line ("Hello, world!"); Ms^,]Q1{
end Hello; 3u+~!yz
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汇编语言 c_HYB/'
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x86 CPU,DOS,TASM F-UY~i8
MODEL SMALL jDy
IDEAL .VTHZvyn
STACK 100H _2U1$0xK
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DATASEG FkKx~I:
HW DB 'Hello, world!$' |w:7).P
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CODESEG DQKhR sC
MOV AX, @data "sL#)<%
MOV DS, AX J&{E
MOV DX, OFFSET HW Ur]5AJ
MOV AH, 09H tw\/1wa.
INT 21H olQ;XTa01F
MOV AX, 4C00H !3?HpR/nV
INT 21H YuLW]Q?v
END Eh8.S)E
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x86 CPU,GNU/Linux,NASM #{i\t E
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). Tw-gM-m;
;Enter this into "hello.asm" then type: won%(n,HT
;"nasm -f elf hello.asm" OW1[Y-o[
;"ld hello.o -o hello" Bam7^g'*!3
;"./hello" XZIj' a0d
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section .data ;data section declaration GZ*cV3Y`&
msg db 'Hello World!',0AH I9k o*f
len equ $-msg ;string length LT#*nr
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section .text ;code section declaration M2vYOg`t:c
global _start ;entry point (start of execution) ;`s/|v
_start: mov edx,len ;string length ze!7qeW
mov ecx,msg ;string start ;]vE"M x$
mov ebx,1 ;file handle: stdout 5BTQJa
mov eax,4 ;sys_write
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int 80h ;kernel system call b^6Ooc/-k
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mov ebx,0 ;return value %'k^aqFL
mov eax,1 ;sys_exit oy#Qj3M8=
int 80h ;kernel system call wGLZzqgq
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x86 CPU,Windows,MASM32 C+*: lLY
.386 NC@OmSR\0
.model flat,stdcall 'd0]`2tVg4
option casemap:none u=
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;Include 文件定义 &*[T
include windows.inc
h ej
include user32.inc iHWl%]7sN
includelib user32.lib A$[@AY$MI
include kernel32.inc trtI^^/%
includelib kernel32.lib Z5_U D
;数据段 DHgEhf]
.data 6\/C]![%
szCaption db 'A MessageBox!',0 ?uOdqMJV
szText db 'Hello,world!',0 f!0* ^d
;代码段 E3;[*ve
.code wM_k D
start: U]d{hY."
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK LF{d'jJ&K
invoke ExitProcess,NULL MU%C_d%.
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LIirOf~e;!
end start qmv%N
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BEGIN { print "Hello, world!" } =<n+AqJ%
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BASIC 7`|$uIM`
传统版BASIC(例如GWBASIC): $Rd74;edn
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10 PRINT "Hello, world!" yA
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20 END a
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或在提示符输入: $IUT5Gia`
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?"Hello, world!":END kd9hz-*
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现代版BASIC(例如Quick BASIC): i|)<#Ywl
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Print "Hello, world!" )&;?|X+p
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以下的语句在Quick BASIC中同样有效: s+h`,gg9
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? "Hello,world!" |Q?IV5%$
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BCPL Ky|d RbK,
GET "LIBHDR" K8ecSs}}J
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LET START () BE J-au{eP^
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WRITES ("Hello, world!*N") wtu WzHrF
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Befunge H3H3UIIT_
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#include <stdio.h> KB0HM
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int main(void) AcqsXBKd
{ H~Xi;[{7
printf("Hello, world!\n"); &^=6W3RD
return 0; E:a_f!
} ,_,Z<X/
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C++ %5?qS`/c(
#include <iostream> .DR^<Qy
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int main() _z4c7_H3
{ ^oDC F
std::cout << "Hello, world!" << std::endl;
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return 0; W3Oj6R
} u,mC`gz
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C++/CLI 1:h{(
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int main() 56T<s+X>
{ kq&xH;9=.
System::Console::WriteLine("Hello, world!"); q+<X*yC
} ~xZFm
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C# (C Sharp) l*V]54|ON3
class HelloWorldApp t}n:!v"|+O
{ $$ma1.t"
public static void Main() ca%s$' d
{ #usi1UWB#Q
System.Console.WriteLine("Hello, world!"); :y^0]In
} scZdDbL6+
} | #Z+s-
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COBOL sH(@X<{p
IDENTIFICATION DIVISION. `"`/_al^
PROGRAM-ID. HELLO-WORLD. xF![3~~3[
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ENVIRONMENT DIVISION. Z.TYi~d/9D
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DATA DIVISION. `/$yCXy
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PROCEDURE DIVISION. `}<x"f7.z
DISPLAY "Hello, world!". @Cg%7AF
STOP RUN. Z7>pz:,
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Common Lisp &Z3g$R 9
(format t "Hello world!~%") 6a$=m3ic
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DOS批处理 TN!8J=sx.
@echo off ,rkY1w-
echo "Hello, world!" - "`5r6
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Eiffel LE$_qX`L
class HELLO_WORLD QlT{8uw)
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creation 1o5n1
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make av|r^zc
feature 2wCTd:e:
make is kYMKVR
local 2GB)K?1M
io:BASIC_IO /BeA-\B
do ?5@!r>i=<
!!io euO!vLd X
io.put_string("%N Hello, world!") 4L<h%
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end -- make za$v I?ux
end -- class HELLO_WORLD _ zM/>Qa
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Erlang N<XS-XB,
-module(hello). v',%
-export([hello_world/0]). ?VUW.-
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hello_world() -> io:fwrite("Hello, World!\n"). }_,1i3Rip
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Forth i
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." Hello, world!" CR fH{ _X
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