“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。 d[3me{Rs
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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》。 Ie^Ed`
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以下是用不同语言写成的Hello World程序的几个例子: )9yQ
C
Ada 6J,h}S
with Ada.Text_Io; use Ada.Text_Io; T"Y#u
procedure Hello is I &iyj99n
begin $oQOOa@;i)
Put_Line ("Hello, world!"); -@w,tbc$
end Hello; Zio!j%G
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汇编语言 %@a;q?/?Nd
,ZJ}X 9$<
x86 CPU,DOS,TASM BNdq=|,+"
MODEL SMALL U U_0@V<
IDEAL /=6_2t#vA
STACK 100H LvG$J*
}=bzUA`C
DATASEG UDi(7c0.
HW DB 'Hello, world!$' iw,uwh|L
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CODESEG (v/L
MOV AX, @data ,Lp"Ia
MOV DS, AX ^R@)CIQ
MOV DX, OFFSET HW ZSQiQ2\)
MOV AH, 09H Sr6'$8#>Y
INT 21H +-'F]?DN'
MOV AX, 4C00H R|qrK
INT 21H M{24MF
END n>.@@
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x86 CPU,GNU/Linux,NASM \ 2y/:
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). PM84Z@Y
;Enter this into "hello.asm" then type: Jl\xE`-7
;"nasm -f elf hello.asm" n zaDO-2!
;"ld hello.o -o hello" ZzE( S
;"./hello" O6y:e#0z
}XBF#BN
section .data ;data section declaration cF15Mm2
msg db 'Hello World!',0AH I*a@_EO
len equ $-msg ;string length TzaeE
p+=zl`\=|
section .text ;code section declaration =A6*;T"W
global _start ;entry point (start of execution) kQ\ $0=6N9
_start: mov edx,len ;string length ?Sh]kJO
mov ecx,msg ;string start /W,hOv
mov ebx,1 ;file handle: stdout 0 j!<eN=
mov eax,4 ;sys_write =_k
int 80h ;kernel system call 8wkhbD|;
6Z#Nh@!+C
mov ebx,0 ;return value 30^q_|l:]
mov eax,1 ;sys_exit Fc`IRPW<
int 80h ;kernel system call 'Jf
LTG.
n+=qT$w)
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x86 CPU,Windows,MASM32 ~fkcal1@
.386 q#AEu
xI1
.model flat,stdcall h<&GdK2U+
option casemap:none 4Px|:7~wT8
;Include 文件定义 )Q`Ycz-
include windows.inc i.6 b%
include user32.inc fu\j
includelib user32.lib m@+v6&,
include kernel32.inc `"CA$Se8
includelib kernel32.lib *Ze0V9$'
;数据段 )KFxtM-
.data [&99#7B
szCaption db 'A MessageBox!',0 kfas4mkc
szText db 'Hello,world!',0 N@PwC(
;代码段 p}pRf@(`\
.code #>aq'47j
start: 0a:oC(Ak
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK `:3nF'
invoke ExitProcess,NULL ?X|q
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> A;rk4)lij
end start Rf4K Rhi
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AWK vcQl0+&
BEGIN { print "Hello, world!" } y_L8i[
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BASIC iqB5h|
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传统版BASIC(例如GWBASIC): hGD@v{/
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10 PRINT "Hello, world!" =|AYT6z,
20 END >+7{PF+sB
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或在提示符输入: 9oc_*V0<
eV}" L:bgJ
?"Hello, world!":END (Nc~l ^a
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现代版BASIC(例如Quick BASIC): z**2-4 z
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Print "Hello, world!" \ejHM}w3,
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以下的语句在Quick BASIC中同样有效: |qe;+)0>K
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? "Hello,world!" }h Wv
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