“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。 #a|r
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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》。 8~.8"gQ
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以下是用不同语言写成的Hello World程序的几个例子: kDQE*o
Ada !,b&e
with Ada.Text_Io; use Ada.Text_Io; MZX@Gi<S[
procedure Hello is &ns??:\+T
begin cR55,DR,#W
Put_Line ("Hello, world!"); ih75C"
end Hello; 5__B
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汇编语言 ~SA>$
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x86 CPU,DOS,TASM ;Tq4!w'rH
MODEL SMALL apM)$
IDEAL E/1:4?1 S
STACK 100H `GY]JVW
qn{9vr
DATASEG EUgKJ=jw
HW DB 'Hello, world!$' Dcs O~mg
#-"C_~-MH
CODESEG pR`nQM-D
MOV AX, @data d:]ZFk_*
MOV DS, AX {m,LpI0wG
MOV DX, OFFSET HW >8vq`,e
MOV AH, 09H CSWA/#&8>
INT 21H ZN'B@E=p
MOV AX, 4C00H # M3d =
INT 21H _|MK0'+f
END E2.!|u2
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x86 CPU,GNU/Linux,NASM ||7x51-yj
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ,%V%g!6{
;Enter this into "hello.asm" then type: Y|/,*,u+
;"nasm -f elf hello.asm" r`+G9sj3U
;"ld hello.o -o hello" =&.9z 4A
;"./hello" Pu BE=9,
:Us+u-~
section .data ;data section declaration SD:Bw0gzrI
msg db 'Hello World!',0AH .K#'
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len equ $-msg ;string length
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section .text ;code section declaration *'{9(Oj
global _start ;entry point (start of execution) aqi]5,
_start: mov edx,len ;string length 3_i29ghv
mov ecx,msg ;string start &wkbr2P
mov ebx,1 ;file handle: stdout (Nf!E[}Z
mov eax,4 ;sys_write wYv++<
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int 80h ;kernel system call %(\et%[]
K}whqe]j
mov ebx,0 ;return value Rp_ }_hL0
mov eax,1 ;sys_exit 0Uk;&a0s
int 80h ;kernel system call 8f'r_,"
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x86 CPU,Windows,MASM32 LiGECqWBa'
.386 0NvicZ7VR
.model flat,stdcall Z)u_2e
option casemap:none +& M>J|
;Include 文件定义 x;STt3M~
include windows.inc !0KNA1w,
include user32.inc =C)2DW J1
includelib user32.lib e>uq/|.!
include kernel32.inc Wh%@
includelib kernel32.lib 6mIRa(6V
;数据段 f{(D+7e}
.data \x8'K
szCaption db 'A MessageBox!',0 Gch3|e
szText db 'Hello,world!',0 DsHm,dZ
;代码段 w(y
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.code criNeKa
start: kp)1s>c
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK [4PiQyr
invoke ExitProcess,NULL q((%sWp
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> X:(t,g*7
end start iE
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AWK u*7>0o|H:
BEGIN { print "Hello, world!" } i>pUTT
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BASIC a5`9mR)Y$'
传统版BASIC(例如GWBASIC): p%\&M bA
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10 PRINT "Hello, world!" H]{`q
20 END Vg"v C
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或在提示符输入: )Tn(!.
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?"Hello, world!":END Ff[GR$m
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现代版BASIC(例如Quick BASIC): ]99;7
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Print "Hello, world!" 'f7s*VKG
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以下的语句在Quick BASIC中同样有效: i)]^b{5nyB
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? "Hello,world!" Z =*h9,MY
=u5( zaBe
5J6~]J
BCPL '@5"p.
GET "LIBHDR" {'+.?g
ipRH.1=
LET START () BE =MmAnjo
$( jhka;m
WRITES ("Hello, world!*N") (~#-J7
$) AnBD~h h
L^ U.h
W)odaab7
Befunge u&o<>d;)
"!dlrow olleH">v bI)%g
, lygv#s-T
^_@ :l {%H^;1
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