“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。 6I GUp
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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》。 }VxbO8\b(
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以下是用不同语言写成的Hello World程序的几个例子: BV,P;T0"D
Ada Cv862kP
with Ada.Text_Io; use Ada.Text_Io; FVM:%S
JjT
procedure Hello is M-1 VB5
begin zM{'GB+en
Put_Line ("Hello, world!"); .}>d[},F
end Hello; uH[d%y/
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2:'C|
汇编语言 //cj$}Rn!
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x86 CPU,DOS,TASM "@U9'rKx
MODEL SMALL yzr>]"o
IDEAL |3{DlZ2S
STACK 100H j_S///
z2Sp
DATASEG {vYmK#}
HW DB 'Hello, world!$' Dz/I"bZLC
jV
Yt=j*"V
CODESEG +^tq?PfE
MOV AX, @data YY-{&+,
MOV DS, AX nD6mLNi%a
MOV DX, OFFSET HW CY;ML6c@
MOV AH, 09H G6K;3B
INT 21H (,1}P
MOV AX, 4C00H b:3n)-V{ u
INT 21H 08AC9
END {Ts@#V=:
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x86 CPU,GNU/Linux,NASM vWY}+#
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). BE. v+'c"
;Enter this into "hello.asm" then type: i0DYdUj
;"nasm -f elf hello.asm" wjh[}rTV*
;"ld hello.o -o hello" Nw ;BhBt
;"./hello" fD+'{ivN4
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section .data ;data section declaration vw=OGjT_>m
msg db 'Hello World!',0AH {wMw$Fvf
len equ $-msg ;string length y;A<R[|Ve
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section .text ;code section declaration pFi.?|6"
global _start ;entry point (start of execution) & V:q}Q
_start: mov edx,len ;string length OJ8 ac6cJ
mov ecx,msg ;string start !9=hUpRN
mov ebx,1 ;file handle: stdout f1MKYM%^x
mov eax,4 ;sys_write )1ia;6}
int 80h ;kernel system call *0]E4]ZO
x&9}] E^<
mov ebx,0 ;return value Qr]xj7\@i
mov eax,1 ;sys_exit &.z: i5&o!
int 80h ;kernel system call MMCac6;Aea
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x86 CPU,Windows,MASM32 `s#0/t
.386 jn vJ`7zFP
.model flat,stdcall Jj+|>(P
option casemap:none 3 EH/6
;Include 文件定义 tdSy&]P
include windows.inc H_)\:gTG
include user32.inc Nq'Cuwsp
includelib user32.lib D QO~<E6c
include kernel32.inc )W9W8>Cc5_
includelib kernel32.lib ~_ss[\N
;数据段 USfpCRj9
.data @igGfYy
szCaption db 'A MessageBox!',0 [of{~
szText db 'Hello,world!',0 \Z9+U:n
;代码段 hZNS$
.code Z$!>hiz2
start: B:S/
?v
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK [1Pw2MC<
invoke ExitProcess,NULL OAPR wOQ^=
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> K{)N:|y%!$
end start 1}+lL)-!
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AWK @wO"?w(
BEGIN { print "Hello, world!" } \jL n5$OW
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BASIC Nd!0\ "AE
传统版BASIC(例如GWBASIC): A41*4!L=
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10 PRINT "Hello, world!" -JOtvJIQI
20 END I;iJa@HWQ
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或在提示符输入: *olV Y/'O
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?"Hello, world!":END 1{@f:~ v?
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现代版BASIC(例如Quick BASIC): #xL^S9P
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Print "Hello, world!" 2eErvfC[
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以下的语句在Quick BASIC中同样有效: w@&g9e6E
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? "Hello,world!" "@: b'm
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BCPL J6pQ){;6
GET "LIBHDR" q]Y [W1
ZL[~[
LET START () BE } LuPYCzpu
$( Pd-0u>k
WRITES ("Hello, world!*N") W,&z:z>
$) P.^%8L
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Befunge sevaNs
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