“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。 ~0|~Fg
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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》。 rd0BvQ9TK
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以下是用不同语言写成的Hello World程序的几个例子: vjZX8KAiZ
Ada K,|Gtaa~
with Ada.Text_Io; use Ada.Text_Io; )+oDa{dZ
procedure Hello is w^p
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begin cpFw]w%]
Put_Line ("Hello, world!"); F]z xx
end Hello; @6
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汇编语言 }.o
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x86 CPU,DOS,TASM \[]36|$LS
MODEL SMALL WsJ3zZc
IDEAL 6g@j,iFy
STACK 100H =o{zw+|% %
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DATASEG 4eBM/i
HW DB 'Hello, world!$' c(ZkK
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CODESEG eO(VSjo'`
MOV AX, @data pL.r
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MOV DS, AX sA3 4`ZAa
MOV DX, OFFSET HW m,Q<4'
MOV AH, 09H
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INT 21H x?va26FV
MOV AX, 4C00H U,[vfSDGr
INT 21H %Ni)^
END 46Nl];g1`
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x86 CPU,GNU/Linux,NASM =6ZZ/+6b
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). rm+|xvZ4
;Enter this into "hello.asm" then type: Ls5|4%+&
;"nasm -f elf hello.asm" +7^%fX;3pW
;"ld hello.o -o hello" QI=",vmau
;"./hello" >e=tem~/
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section .data ;data section declaration UXDd8OJL
msg db 'Hello World!',0AH "CT'^d+
len equ $-msg ;string length rVt6tx
1 c3gHc7{t
section .text ;code section declaration #)GL%{Oa
global _start ;entry point (start of execution) $;@^coz9U
_start: mov edx,len ;string length J6n@|L!yO
mov ecx,msg ;string start vbmi_[,U
mov ebx,1 ;file handle: stdout -%5*c61
mov eax,4 ;sys_write ,wlFn
int 80h ;kernel system call 9Fv1D
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mov ebx,0 ;return value +a"MSPC4w
mov eax,1 ;sys_exit HP:ee+n
int 80h ;kernel system call P`@d8%*;
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x86 CPU,Windows,MASM32 % E3
.386 QPg
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.model flat,stdcall \WQ\q
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option casemap:none k9~NIvnB`
;Include 文件定义 A'c0zWV2
include windows.inc l"f.eo0@7
include user32.inc qTj7mUk
includelib user32.lib u+&BR1)C
include kernel32.inc !)?n n3
includelib kernel32.lib K``MS
;数据段 E<:XHjm
.data z4HIDb
szCaption db 'A MessageBox!',0 58DkVQ 6
szText db 'Hello,world!',0 po4seW!
;代码段 }JeGjpAcV
.code P%8
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start: P6u9Ngay
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK -=H*(M
invoke ExitProcess,NULL )^qM%k8
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 3=RV Jb
end start )D{L<.i_
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BEGIN { print "Hello, world!" } mKugb_d?
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BASIC 5=WzKM
传统版BASIC(例如GWBASIC): JR8 b[Oj.S
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10 PRINT "Hello, world!" ^I4'7]n-
20 END twv|,kM
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或在提示符输入: j]U sb_7
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?"Hello, world!":END b#`XmB
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现代版BASIC(例如Quick BASIC): ZJ}9g(X..g
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Print "Hello, world!" N[~{'i
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以下的语句在Quick BASIC中同样有效: H=Scrvfx
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? "Hello,world!" #S)]`YW
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BCPL =r"-Pm{
GET "LIBHDR" l/1u>'
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LET START () BE -AnQZy
$( f++MH]I;
WRITES ("Hello, world!*N") hgIqr^N9
$) Z6s-n$dSm
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Befunge wpgO09
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C (V&5EO8)
#include <stdio.h> a ?D]]0%
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int main(void) 42/MBP`\Y
{ A]0A,A0
printf("Hello, world!\n"); f3yH4r?;w
return 0; 6HroKu
} OlU')0Y
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C++ zM+4<k_dH]
#include <iostream> &f=O`*I'+!
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int main() 26M:D&| ZB
{ Eep~3U
std::cout << "Hello, world!" << std::endl; 0Q7teXRM
return 0; m}UcF oaO
} LN z
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C++/CLI kM6i{{Q
int main() m+UWvUB)
{ 1.9bU/X
System::Console::WriteLine("Hello, world!"); QhhL_vP
} ,(u-q]8
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C# (C Sharp) !hs33@*u~
class HelloWorldApp $e~MKLd
{ ?^whK<"]
public static void Main() sYEh>%mo^C
{ K`=9"v'f+
System.Console.WriteLine("Hello, world!"); -9]
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} *{_N*p\{
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