“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。 V!_71x\-Q
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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》。 W~1~k{A
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以下是用不同语言写成的Hello World程序的几个例子: ^x>Qf(b
Ada CusF/>
with Ada.Text_Io; use Ada.Text_Io; :aCrX
procedure Hello is hVUh0XeO
begin ,f3pqi9|
Put_Line ("Hello, world!"); w
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end Hello; MK#wut
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ED>prE0
汇编语言 k <iTjI*N
n{*D_kM(H
x86 CPU,DOS,TASM "*1f;+\
MODEL SMALL {^a36i
IDEAL Z<[<n0o1
STACK 100H \JEXX4%
m,i,n9C->
DATASEG G2bDf-1ew
HW DB 'Hello, world!$' x!LQxoNF
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CODESEG nfSbM3D]h
MOV AX, @data d\{>TdyF
MOV DS, AX Hb} X-6N
MOV DX, OFFSET HW H %JaZ?(
MOV AH, 09H IYn]U4P.
INT 21H `]Fx.)C#
MOV AX, 4C00H ygJr=_iA9
INT 21H K_)eWf0a
END i':ydDOOHA
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x86 CPU,GNU/Linux,NASM TxjYrzC
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). `*", <
;Enter this into "hello.asm" then type: 6tHO!`}1
;"nasm -f elf hello.asm" M5nWVK7c
;"ld hello.o -o hello" )c n+1R
;"./hello" Qd}m`YW-f$
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section .data ;data section declaration DI+]D~N
msg db 'Hello World!',0AH d@`M
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len equ $-msg ;string length JWvjWY2+P
x3jb%`o#!
section .text ;code section declaration |8>3`w!
global _start ;entry point (start of execution) [[PEa-992
_start: mov edx,len ;string length poGc a1
mov ecx,msg ;string start IG)s^bP
mov ebx,1 ;file handle: stdout ;c~cet4
mov eax,4 ;sys_write S#)Eom?V
int 80h ;kernel system call @k[R/,#'[t
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mov ebx,0 ;return value B~o\+n
mov eax,1 ;sys_exit wW>zgTG
int 80h ;kernel system call xh7c VE[UM
f` =CpO*
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x86 CPU,Windows,MASM32 #e'
}.4cr
.386 -F'b8:m
.model flat,stdcall 8Ac)'2t;U
option casemap:none Bm&kkx.9P
;Include 文件定义 ~|<WHHN(
include windows.inc \fA{1
include user32.inc bM8If"
includelib user32.lib 7VcmVq}X
include kernel32.inc =mA: ctu~v
includelib kernel32.lib }ci#>
;数据段 }|PY!O
.data /}Jj
szCaption db 'A MessageBox!',0 ono4U.C9
szText db 'Hello,world!',0 3a.kBzus
;代码段 :Y9NLbv
.code 'F>'(XWWQ
start:
NR;1z
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK ml \4xp,
invoke ExitProcess,NULL G}&Sle]
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> X[f=h=|
end start \j&^aAp r
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AWK $O9^SB
BEGIN { print "Hello, world!" } Neg,qOt
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BASIC sB;@>NY
传统版BASIC(例如GWBASIC): 8_T6_jL<
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