“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。 JZnWzqFw
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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》。 <V8i>LBlz
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以下是用不同语言写成的Hello World程序的几个例子: aKUr":z
Ada |zT0g]WH
with Ada.Text_Io; use Ada.Text_Io; ^+wzm2i
procedure Hello is y;>I'e
begin 1*jL2P]D
Put_Line ("Hello, world!"); :hr@>Y~r
end Hello; 7cy~qg
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B*AMo5
汇编语言 R`?^%1^N
7 r<>^j'
x86 CPU,DOS,TASM ,6bMfz
MODEL SMALL jlP7'xt1%
IDEAL A X#!9-m3
STACK 100H U`Ag|R
A-u5
DATASEG 2&d&$Jg
HW DB 'Hello, world!$' W.R'2R#
Rp|&1nS
CODESEG Jqj6L993e
MOV AX, @data &; skB.
MOV DS, AX o'4@]ae
MOV DX, OFFSET HW k$ M4NF~$
MOV AH, 09H @~XlI1g$i
INT 21H ,+BgY4OY
MOV AX, 4C00H &}$D[ 4N
INT 21H /
IS WC
END &aQ)x
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x86 CPU,GNU/Linux,NASM q{ 1U
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). Pb;`'<*U
;Enter this into "hello.asm" then type: F)5Aq H/p
;"nasm -f elf hello.asm" 79x9<,a)
;"ld hello.o -o hello" 7x]nY. \
;"./hello" /#=J`*m_
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section .data ;data section declaration FlG^'UD
msg db 'Hello World!',0AH 1c"m$)a4
len equ $-msg ;string length ]e`_.>U
QX=;,tr
section .text ;code section declaration gWo~o]f
global _start ;entry point (start of execution) R"o,m
_start: mov edx,len ;string length 5mNXWg7#]
mov ecx,msg ;string start sZB6zTX
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mov ebx,1 ;file handle: stdout HXHPz4
mov eax,4 ;sys_write nQHd\/B
int 80h ;kernel system call a0.3$
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mov ebx,0 ;return value z n!
mov eax,1 ;sys_exit 49$4
int 80h ;kernel system call K@~#Gdnl
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/xbZC{R
x86 CPU,Windows,MASM32 IyN9
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.386 Y]K]]Ehp
.model flat,stdcall aF"Z!HD
option casemap:none Hc%\9{zH
;Include 文件定义 =M#?* e
include windows.inc -b}S3<15@
include user32.inc X4G55]D$>
includelib user32.lib y;Ln ao7i
include kernel32.inc ?|J+dW
includelib kernel32.lib ~&3"Mi&>`
;数据段 P$>kBW53
.data walRqlo@
szCaption db 'A MessageBox!',0 r(T/^<
szText db 'Hello,world!',0 7NC8<