“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。 1SSS0 &
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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》。 4XIc|a Aa
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以下是用不同语言写成的Hello World程序的几个例子: eR:C?v
Ada 63Z^ k(
with Ada.Text_Io; use Ada.Text_Io; |H>;a@2d
procedure Hello is !TLJk]7uC
begin /-Z}=
Put_Line ("Hello, world!"); DIx.a^LR
end Hello; LyRW\\z2
W}@IUCRs
$) m$c5!
汇编语言 8~ u/gM
z8cefD9F
x86 CPU,DOS,TASM 1C(sBU"
MODEL SMALL -9(pOwN
|m
IDEAL z['2
STACK 100H j%=X
ps
^o4](l
DATASEG USZBk0$
HW DB 'Hello, world!$' H:cAORLB
'zOB!QqA`v
CODESEG
@W-0ybv
MOV AX, @data i@mS8%|l
MOV DS, AX |!{ Y:f;
MOV DX, OFFSET HW lN*beOj
MOV AH, 09H jc HyRR1R
INT 21H :Q8*MJ3&V
MOV AX, 4C00H k%VYAON
INT 21H &z@}9U*6b
END Uo;a$sR
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x86 CPU,GNU/Linux,NASM d'iSvd.
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). g{CU1c)B
;Enter this into "hello.asm" then type: L8(2or
;"nasm -f elf hello.asm" [,(+r7aB
;"ld hello.o -o hello" oxL)Jx\c9A
;"./hello" 3!{Tw6A8(
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section .data ;data section declaration hbEqb{#}@
msg db 'Hello World!',0AH }42Hhu7j
len equ $-msg ;string length RK=Pm7L:`y
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section .text ;code section declaration kPoz&e_@
global _start ;entry point (start of execution) y?U@F/^}N
_start: mov edx,len ;string length Vh>|F}%E
mov ecx,msg ;string start kW0ctGFYlf
mov ebx,1 ;file handle: stdout ZG-#YF.1
mov eax,4 ;sys_write Xk\IO0GF
int 80h ;kernel system call (2UA ,
cg_ " }]Y1
mov ebx,0 ;return value k(o(:-+x
mov eax,1 ;sys_exit QAAuFZs
int 80h ;kernel system call W]XM<# ^^
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x86 CPU,Windows,MASM32 X}Om)WCr
.386 LH.Gf
.model flat,stdcall Y`d@4*FN$
option casemap:none LcB+L](
;Include 文件定义 $@O?
include windows.inc %!eRR
include user32.inc I L,l XB<
includelib user32.lib /GX>L)
include kernel32.inc 1rs.
includelib kernel32.lib oUO3,2bn
;数据段 C#e :_e]
.data Nu3gkIz5z-
szCaption db 'A MessageBox!',0 /nsBUM[;
szText db 'Hello,world!',0 Zb2PFwcy
;代码段 `wZ
.code #-PMREgO
start: v 2p
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK bRrSd:e
invoke ExitProcess,NULL @3$ I
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 5gV,^[E-z
end start v9FR
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> ;#Y0
AWK o.w/?
BEGIN { print "Hello, world!" } :5$ErI
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k=mLcP
BASIC ~5h4 Gy)
传统版BASIC(例如GWBASIC): i /I
cMF)2^w}
10 PRINT "Hello, world!" 7)[2Ud8
20 END bq)1'beW
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或在提示符输入: -G@uB_C s
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?"Hello, world!":END >N 2kWSa
-s!J3DB
现代版BASIC(例如Quick BASIC): 'jMs&
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Print "Hello, world!" $]xH"Z%"
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以下的语句在Quick BASIC中同样有效: `?.6}*4@_A
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? "Hello,world!" X@}7 #Vt
ky]^N)
3UW`Jyd`k
BCPL <}A6 )=T
GET "LIBHDR" $xdo=4;|
t#_6GL
LET START () BE wJJ|]^0.
$( {fDRVnI?
WRITES ("Hello, world!*N") A^6z.MdYZ
$) l3BN,HNv+
;<[!;8
X_nbNql
Befunge xu"-Uj1
"!dlrow olleH">v 0sKoNzE
, x=a#|]ngG
^_@ "Dk@-Ac
#y7 MB6-
B8T5?bl
Brainfuck bv(+$YR
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< @
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+++++++++++++++.>.+++.------.--------.>+.>. Q.7X3A8
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C bA Yp }
#include <stdio.h> g8&& W_BI
g'T L`=O
int main(void) 5xnEkg4q4
{ PBW_9&