“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。 %_(^BZd
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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》。 )_kU,RvZ
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以下是用不同语言写成的Hello World程序的几个例子: ll
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Ada a|ZJzuqo
with Ada.Text_Io; use Ada.Text_Io; v2ab84
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procedure Hello is %<>|cO
begin F6ZL{2$k@
Put_Line ("Hello, world!"); IK,aA;d
end Hello; /tJ%gF
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F!RP *
汇编语言 &<Fw
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x86 CPU,DOS,TASM **]=!W
MODEL SMALL _4LDzVjNRe
IDEAL ?]\v%[ho
STACK 100H v<ati c
nFjaV`6`@
DATASEG ,_bG'Hmt
HW DB 'Hello, world!$' >&JS-jFg
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CODESEG i'`>YX
MOV AX, @data r@CbhD
MOV DS, AX qhmA)AWG>
MOV DX, OFFSET HW #TIlM]5%
MOV AH, 09H s,j=Kym%
INT 21H dW%;Z
MOV AX, 4C00H E8.1jCL>{"
INT 21H VO<P9g$UD
END ~Efi|A/
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x86 CPU,GNU/Linux,NASM SpMHq_MLM
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax).
A/OGF>
;Enter this into "hello.asm" then type: #Wt1Ph_;
;"nasm -f elf hello.asm" ^=
'+#|:
;"ld hello.o -o hello" $*7AG
;"./hello" ~,{nBp9*
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section .data ;data section declaration #&Zj6en}M]
msg db 'Hello World!',0AH Gdr7d
len equ $-msg ;string length r#c+{yY
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section .text ;code section declaration {qFAX<{D
global _start ;entry point (start of execution) [?n}?0
_start: mov edx,len ;string length Vah.tOU
mov ecx,msg ;string start Zzv,p
mov ebx,1 ;file handle: stdout (kJ"M4*<F'
mov eax,4 ;sys_write 1ifPc5j}
int 80h ;kernel system call
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mov ebx,0 ;return value m$bNQ7
mov eax,1 ;sys_exit %`j2?rn
int 80h ;kernel system call WE&"W$0
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x86 CPU,Windows,MASM32 9U!#Y%*T
.386 lsOZ%p%fV
.model flat,stdcall @qB1:==@7
option casemap:none AAK}t6
;Include 文件定义 #+;0=6+SM
include windows.inc 0{>P^z
include user32.inc $,jynRk7q
includelib user32.lib l_ycB%2e^
include kernel32.inc Gl5W4gW;&
includelib kernel32.lib ANd#m9(x
;数据段 vUgo)C#<
.data L)_L#]Yy
szCaption db 'A MessageBox!',0 sX]ru^F3
szText db 'Hello,world!',0 C6c]M@6
;代码段 @W!cC#u
.code D?P1\<A~
start: )%9P ;/
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK -;U3$[T,J7
invoke ExitProcess,NULL XD|vB+j\O
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 6E.64+PJw
end start J,^e q@(
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AWK ^BQ*l5K
BEGIN { print "Hello, world!" } @Ke3kLQ_\X
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BASIC \"mLLnK?
传统版BASIC(例如GWBASIC): oW8 hC
)-d&XN7
10 PRINT "Hello, world!" B#(2,j7M
20 END e[J0+
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或在提示符输入: ZTP&*+d
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?"Hello, world!":END G1:2MPH
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现代版BASIC(例如Quick BASIC): ;Z}V}B
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Print "Hello, world!" .\b# 0w
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以下的语句在Quick BASIC中同样有效: 9h
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? "Hello,world!" `xd{0EvF
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BCPL 6WX+p3Kv
GET "LIBHDR" zmh3
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F#$[jh$
LET START () BE ejC== Fkc
$( N;d@)h(N!
WRITES ("Hello, world!*N") *27*&&=)H
$) :1\QM'O
WjvD C"
gDjs:]/YR
Befunge cakb.Q
"!dlrow olleH">v ,-{2ai_
, \%N |
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c`h/x>fa
Brainfuck C/x<_VJzN/
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< (3+:/,{'$
+++++++++++++++.>.+++.------.--------.>+.>. sz%'=J~!V
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#include <stdio.h> O8%Y .SK
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int main(void) 9K5[a^q|My
{ naoH685R4
printf("Hello, world!\n"); ce\ F~8y
return 0; -l`1j6
} f*^)0Po
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C++ 0qrsf!
#include <iostream> 7I_lTu(
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int main() s8]9OG3g
{ vS|uN(a.P
std::cout << "Hello, world!" << std::endl; `*=Tf
return 0; kM
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} -] .Y";
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C++/CLI $}G03G@
int main() }{Ncww!iN
{ +\a`:QET
System::Console::WriteLine("Hello, world!"); Y|iJO>_Uu=
} RjS&^uaP
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C# (C Sharp) er?'o1M
class HelloWorldApp n)7olP0p
{ 1&@s2ee4
public static void Main() 6KD
{ `2@t) :
System.Console.WriteLine("Hello, world!"); o(I[_oUy\
} 007SA6xq
} [fU2$(mT+
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COBOL \=yx~c_$L
IDENTIFICATION DIVISION. \HB4ikl
PROGRAM-ID. HELLO-WORLD. ;O2r+n
/M-%]sayj
ENVIRONMENT DIVISION. Q-!a;/
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DATA DIVISION. ;@@1$mzK
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PROCEDURE DIVISION. qxsK-8KT<
DISPLAY "Hello, world!". z6K"}C%
STOP RUN. q=5#t~?
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Common Lisp r2T-= XWB
(format t "Hello world!~%") /
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DOS批处理 u $N2uFc
@echo off c%aY6dQG&%
echo "Hello, world!" p*rBT,'
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Eiffel vmW4 3K;
class HELLO_WORLD h,q%MZ==^s
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creation ;K:)R_H
make aZYa<28?L%
feature f!~gfnn
make is =>Vo|LBoe
local )POuH*j
io:BASIC_IO vv
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do 1FS Jqad
!!io ;(Q4x"?I
io.put_string("%N Hello, world!") 6=kA
end -- make D5]sf>~
end -- class HELLO_WORLD 8VJUaL@
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Erlang }Lx?RU+@=
-module(hello). J 21D/#v
-export([hello_world/0]). XQhBnam%
) =<,$|g
hello_world() -> io:fwrite("Hello, World!\n"). w<