“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。 (S=CxK
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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》。 |U~\;m@
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以下是用不同语言写成的Hello World程序的几个例子: ]REF1<)4z
Ada SrMfd7H8f
with Ada.Text_Io; use Ada.Text_Io; z^KBV^n
procedure Hello is [w FK!?
begin 0eA|Uq~
Put_Line ("Hello, world!"); 7/=r-
end Hello; bI;u};v
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汇编语言 >n&+<06
O+DYh=m*p
x86 CPU,DOS,TASM \$,;@H5I^
MODEL SMALL \3rgwbF
IDEAL zP!j {y4w
STACK 100H 8js1m55KT
M;.:YkrUH
DATASEG ,}^;q58
HW DB 'Hello, world!$' IS{>(XT{
/dR:\ffz2
CODESEG gHH[QLD=I
MOV AX, @data ]*rK;
MOV DS, AX pe\]}&
MOV DX, OFFSET HW =@;\9j
MOV AH, 09H 5G#2#Al(F
INT 21H PC?XE8o
MOV AX, 4C00H *M~BN}.
INT 21H dP/1E6*m
END ~MK%^5y?
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x86 CPU,GNU/Linux,NASM 3qp\jh=FE
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). oHethk
;Enter this into "hello.asm" then type: T' )l
;"nasm -f elf hello.asm" Q\le3KB
;"ld hello.o -o hello" lxLEYDGFS
;"./hello" :RX zqC
[-=y*lx%g
section .data ;data section declaration baR*4{]
msg db 'Hello World!',0AH >\1j`/ :ZI
len equ $-msg ;string length n--s[Kdo8
pc](
section .text ;code section declaration eyByAT~W,
global _start ;entry point (start of execution) o7fJ@3B/
_start: mov edx,len ;string length s";9G^:
mov ecx,msg ;string start D'_w
*
mov ebx,1 ;file handle: stdout #t&L}=G{%
mov eax,4 ;sys_write X_wPuU%
int 80h ;kernel system call u5P2*
5&Le? -/\
mov ebx,0 ;return value >s;dooZ
mov eax,1 ;sys_exit }}d,xI
int 80h ;kernel system call /o nZ14
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t \,XG
x86 CPU,Windows,MASM32 +78cQqDY!
.386 e6'y S81
.model flat,stdcall gp]T.ol
option casemap:none %Wg8dy|
;Include 文件定义 Y$eO:67;
include windows.inc R\lUE,o]<q
include user32.inc SGLU7*sfd
includelib user32.lib WQltUaF
include kernel32.inc bR83N
includelib kernel32.lib 4Mv] z^
;数据段 k4~2hD<|
.data 9.l*#A^
szCaption db 'A MessageBox!',0 5wm(gF_t
szText db 'Hello,world!',0 k :`yxxYIh
;代码段 ~|8-Mo1ce
.code yH',vC.
start: bb`8YF+?'
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK B5/"2i
invoke ExitProcess,NULL ^qNr<Ye
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> nW_cjYS%
end start 0{.[#!CSk
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AWK ,uCgC4EP
BEGIN { print "Hello, world!" } d`J~w/]
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63pd W/\j
BASIC 2$yNryd
传统版BASIC(例如GWBASIC): o Yrg;]H
9<1dps=c
10 PRINT "Hello, world!" rc7^~S]5
20 END eIt<da<G?
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