“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。 O XP\R
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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》。 cr;`Tl~}s
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以下是用不同语言写成的Hello World程序的几个例子: jp2Q9Z
Ada r'7LR
with Ada.Text_Io; use Ada.Text_Io; S<wj*"|.s
procedure Hello is PoSpkJH
begin !|Q5Zi;aX7
Put_Line ("Hello, world!"); >QkP7Kb
end Hello; 8V/L:h#7
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汇编语言 ]d}0l6
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x86 CPU,DOS,TASM wq!iV |
MODEL SMALL E%N2k|%8d_
IDEAL <%?#AVU[
STACK 100H r(A.<`\
\}0-^(9zd
DATASEG f58?5(Dc|
HW DB 'Hello, world!$' 2{|$T2?e
{Qu"%h.Al
CODESEG {R6HG{"IS6
MOV AX, @data jNDx,7F-
MOV DS, AX yHo[{,4itA
MOV DX, OFFSET HW GEUg]nw
MOV AH, 09H %/%UX{8R
INT 21H R9+jW'[K
MOV AX, 4C00H V9NTs8LKc
INT 21H k?GD/$1t
END iA
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x86 CPU,GNU/Linux,NASM Y"g.IK`V
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ,F6=b/eZ
;Enter this into "hello.asm" then type: pc]J[ S?P
;"nasm -f elf hello.asm" XRN+`J
;"ld hello.o -o hello" iUk-'
;"./hello" _i0kc,*C\
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section .data ;data section declaration OX]V)QHVZ
msg db 'Hello World!',0AH cZ8.TsI~
len equ $-msg ;string length zmuMWT;
x Gk6n4Gg
section .text ;code section declaration o+B:#@9?
global _start ;entry point (start of execution) O*6n$dUj3
_start: mov edx,len ;string length 1 T<+d5[C
mov ecx,msg ;string start I{'f|+1
mov ebx,1 ;file handle: stdout `_ %S
mov eax,4 ;sys_write aW_oD[l
int 80h ;kernel system call PUJ2`iP1^3
hB;VCg8
mov ebx,0 ;return value |KI UgI
mov eax,1 ;sys_exit 4bVO9aUG{
int 80h ;kernel system call am1[9g8L
x\e;+ubt}
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x86 CPU,Windows,MASM32 ^ <`(lyph
.386 Jb_1LZ)]
.model flat,stdcall `O?T.p)
option casemap:none @&F@I3`{
;Include 文件定义 {=2DqkTD
include windows.inc G.VuKsP]
include user32.inc #FOqP!p.E
includelib user32.lib Cs3^9m6;d
include kernel32.inc y;cUl, :v
includelib kernel32.lib zdl%iop3e
;数据段 EI~"L$?
.data "^j>tii
szCaption db 'A MessageBox!',0 O) |P,?
szText db 'Hello,world!',0 _9H*agRe
;代码段 BAj-akc f
.code ( lm&*tKm
start: sb_oD{+gW
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK lT&wO