“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。 UT"L5{c
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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》。 %o.+B~r
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以下是用不同语言写成的Hello World程序的几个例子: uI.4zbgl[
Ada df}B:?Ew.
with Ada.Text_Io; use Ada.Text_Io; -0lpsF
procedure Hello is M1VRc[
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begin tWD*uAb
Put_Line ("Hello, world!"); f'*HP%+Y
end Hello; k?1cxY s
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汇编语言 3
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x86 CPU,DOS,TASM ("wPkm^
MODEL SMALL jUdW o}/
IDEAL RDk{;VED{
STACK 100H 3)I v8mA
4{*K%pv\
DATASEG h(jg7R
HW DB 'Hello, world!$' Q-BciBh$
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CODESEG P6;L\9=H<
MOV AX, @data 65qH
MOV DS, AX v||8Q\d
MOV DX, OFFSET HW j @sd x)1+
MOV AH, 09H [BmondOx
INT 21H G`gYwgU;
MOV AX, 4C00H m &c8@-T
INT 21H XA>@0E>1r
END oQFpIX;\m
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x86 CPU,GNU/Linux,NASM 7RTp+FC]
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). G,$RsP
;Enter this into "hello.asm" then type: k2p{<SO;
;"nasm -f elf hello.asm" RwN*/Li
;"ld hello.o -o hello" 5=5~GX-kr
;"./hello" 2A
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*}cF]8c5W
section .data ;data section declaration kQwBrb4
msg db 'Hello World!',0AH f`P%aX'cBQ
len equ $-msg ;string length W/xb[w9v
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section .text ;code section declaration *}A J7]
global _start ;entry point (start of execution) V 1;n5YL
_start: mov edx,len ;string length [P,1UO|$B
mov ecx,msg ;string start ;g7nG{
mov ebx,1 ;file handle: stdout FG1$_zN |
mov eax,4 ;sys_write o1-Zh!*a*
int 80h ;kernel system call \<a(@#E*~
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mov ebx,0 ;return value OT\[qaK
mov eax,1 ;sys_exit @y{Whun~
int 80h ;kernel system call !$f@j6.
q/<.^X
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x86 CPU,Windows,MASM32 kMf]~EZ?
.386 mS0*%[S {
.model flat,stdcall 7[ *,t
option casemap:none ;Rt?&&W
;Include 文件定义 7YkxIzE
include windows.inc dEJ>8e8
include user32.inc rW&8#&
includelib user32.lib zf4@:GM`
include kernel32.inc LH3PgGi,
includelib kernel32.lib j^ex5A.&
&
;数据段 r[JgCj+$&
.data *GTCVxu
szCaption db 'A MessageBox!',0 aKhI|%5kA
szText db 'Hello,world!',0 IH'DCY:
;代码段 YSs9BF:a
.code 9#@dQ/*
start: )1Z*kY?f!
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK Cj31'
invoke ExitProcess,NULL -_4U+Cfmtl
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> wBA[L}
end start <