“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。 IuF-bxA
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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》。 L\[jafb_`
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以下是用不同语言写成的Hello World程序的几个例子: th)jEK;Z
Ada {xX|5/z
with Ada.Text_Io; use Ada.Text_Io; V'$
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procedure Hello is 4J1Q])G9
begin fZO/HzX
Put_Line ("Hello, world!"); L8J/GVmj
end Hello; }2@$2YR[
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汇编语言 10&A3C(E
s@|?N+z
x86 CPU,DOS,TASM ceCshxTU
MODEL SMALL KI{u:Lbi
IDEAL hl+Yr)0\
STACK 100H 6>Y}2fT}o3
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DATASEG voxlo>:
HW DB 'Hello, world!$' W8^gPW*c5
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CODESEG "$&F]0
MOV AX, @data "<WSEs
MOV DS, AX 2h!3[{M\
MOV DX, OFFSET HW ?H`LrL/k
MOV AH, 09H
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INT 21H N\?iU8w=
MOV AX, 4C00H wF(FV4#gs
INT 21H BR=Yte
/
END mx yT==E
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x86 CPU,GNU/Linux,NASM 1jyWP#M#
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). r4s R5p]|
;Enter this into "hello.asm" then type: u$"5SGI6
;"nasm -f elf hello.asm" s"/8h#!zv
;"ld hello.o -o hello" P
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;"./hello" `dK\VK^
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section .data ;data section declaration hmo?gD<
msg db 'Hello World!',0AH L[K_!^MZ
len equ $-msg ;string length ){}#v&
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section .text ;code section declaration d~8Q)"6 [
global _start ;entry point (start of execution) [I9d
_start: mov edx,len ;string length }bVyvH
mov ecx,msg ;string start SZPu"O\
mov ebx,1 ;file handle: stdout tv2dyC&a
mov eax,4 ;sys_write [Dhc9
int 80h ;kernel system call uP$K{ )
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mov ebx,0 ;return value =
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mov eax,1 ;sys_exit m8?(.BJ%
int 80h ;kernel system call KK+Mxoj,
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x86 CPU,Windows,MASM32
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.386 4*3vZ6lhu
.model flat,stdcall #/:[ho{JQ
option casemap:none Rl~Tw9
;Include 文件定义 + |,CIl+
include windows.inc ,y.0Cb0
include user32.inc vcmS]$}
includelib user32.lib b6lL8KOu
include kernel32.inc tL~|/C)d R
includelib kernel32.lib D7%89qt
;数据段 [{ pc1U-
.data BK{8\/dg
szCaption db 'A MessageBox!',0 .^uu*S_
szText db 'Hello,world!',0 (<CLftQKg
;代码段 wKYfqNCH
.code ?aCR>AY5X
start: mf3 G$=[
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK LP~$7a
invoke ExitProcess,NULL Rq7ks To
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 4c% :?H@2
end start QUNsS9
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AWK _,}Ye,(^=
BEGIN { print "Hello, world!" } /sai}r1
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BASIC mF1oY[xa_
传统版BASIC(例如GWBASIC): &ke4":7X
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10 PRINT "Hello, world!" Gd"*mLd
20 END k5($b{
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或在提示符输入: QZ6M,\
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?"Hello, world!":END !cpBX>{w
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现代版BASIC(例如Quick BASIC): (ZnA#%
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Print "Hello, world!" 82<L07fB
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以下的语句在Quick BASIC中同样有效: Cfj*[i4
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? "Hello,world!" wFvilF
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BCPL M3Z yf
GET "LIBHDR" 6k[u0b`
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LET START () BE aX|`G]PhdI
$( OjCT%6hy;
WRITES ("Hello, world!*N") _Sg29qFK
$) K.%E=^~q
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Befunge >}9TdP/oT
"!dlrow olleH">v YGHWO#!Gp
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