“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。 Vp; `!+z"
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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》。 0#Gm# =F
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以下是用不同语言写成的Hello World程序的几个例子: 1d+Kn Jy
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with Ada.Text_Io; use Ada.Text_Io; >y8>OJ?A7-
procedure Hello is &iu]M=Yb
begin 4 ;_g9]
Put_Line ("Hello, world!"); }=f\WWJf0
end Hello; H HX q_-V
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汇编语言 fr`#s\JKw
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x86 CPU,DOS,TASM 0.+Eo.AX4M
MODEL SMALL r{?qvl!q
IDEAL 0 ;LF>+fJ
STACK 100H XSof{:V
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DATASEG U*{0, Ue'
HW DB 'Hello, world!$' W2-l_{
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CODESEG G)YmaHeI;[
MOV AX, @data g]h@U&`~u_
MOV DS, AX pvl];w
MOV DX, OFFSET HW eXsp0!v
MOV AH, 09H E8PwA.
INT 21H *MfH\X379
MOV AX, 4C00H mEYfsO
INT 21H ?4 wl
END `0%;Gz%}
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x86 CPU,GNU/Linux,NASM ?99r>01>
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). Ie!">8."
;Enter this into "hello.asm" then type:
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;"nasm -f elf hello.asm" .!^OmT,u
;"ld hello.o -o hello" dY.X/f
;"./hello" eN5F@isy
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section .data ;data section declaration bbS,pid1
msg db 'Hello World!',0AH NApy(e5%
len equ $-msg ;string length IHCxM|/k(M
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section .text ;code section declaration
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global _start ;entry point (start of execution) +MHIZI
_start: mov edx,len ;string length *ze/$vz-
mov ecx,msg ;string start 8(-
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mov ebx,1 ;file handle: stdout d]K8*a%[-
mov eax,4 ;sys_write ,Gbc4x
int 80h ;kernel system call Ha]vG@?+
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mov ebx,0 ;return value #k/T\PQ0s
mov eax,1 ;sys_exit }LS.bQKqi,
int 80h ;kernel system call +68age;dM
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x86 CPU,Windows,MASM32 %OHWGac"i
.386 c1i[1x%
.model flat,stdcall ?z|Bf@TJ[+
option casemap:none "x]7et,
;Include 文件定义 I m-M2n
include windows.inc ,>qtnwvlHP
include user32.inc L Y4bn)Qf
includelib user32.lib $s
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include kernel32.inc e]>=;Zn
includelib kernel32.lib Ui"$A/
;数据段 _IEbRVpb
.data F@ |(
szCaption db 'A MessageBox!',0 @6|0H`kv
szText db 'Hello,world!',0 [oBRH]9cq
;代码段 pUmT?N!
.code h5@7@w%
start: +>eX1WoTy
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK LZG(T$dI
invoke ExitProcess,NULL !s$1C=z5u
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> b^<7a&
end start r91i :
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BEGIN { print "Hello, world!" } r$M<vo6C
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BASIC Nk%$;Si
传统版BASIC(例如GWBASIC): XmwR^
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10 PRINT "Hello, world!" 8kd):gZKZ
20 END (6H7?nv
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或在提示符输入: Z
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?"Hello, world!":END I5[@C<b
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现代版BASIC(例如Quick BASIC): +7lr#AvU/
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Print "Hello, world!" txMC^-J2l
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以下的语句在Quick BASIC中同样有效: E*tT^x)
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? "Hello,world!" &'DR`e O)
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GET "LIBHDR" h<'tQGC
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LET START () BE qKeR}&b
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WRITES ("Hello, world!*N") Ln+ .$ C
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Befunge P A*U\
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#include <stdio.h> 8WQc8
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int main(void) /{[tU-}qJ
{ hCX/k<}I
printf("Hello, world!\n"); m>w{vqPwJ
return 0; Gf~^Xv!T
} o?= &kx
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C++ zrE{CdG%y
#include <iostream> 0Nk!.gY
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int main() ?caHS2%?ae
{ _x$Eq:
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std::cout << "Hello, world!" << std::endl; 6I_4{
return 0; l8%BRG
} 0,#n_"
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C++/CLI \7o7~pll
int main() >G [:Q
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{ d[H`Fe6h
System::Console::WriteLine("Hello, world!"); X$%W&:
} L&|^y8
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C# (C Sharp) 8{&.[SC7
class HelloWorldApp %l%2 hvGZ
{ ?d3<GhzlR3
public static void Main() w&hCt