“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。 K#hY bDm
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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》。 F*t_lN5{
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以下是用不同语言写成的Hello World程序的几个例子: 3DC%I79
Ada Qk.Q9@3W
with Ada.Text_Io; use Ada.Text_Io; puN=OX}C
procedure Hello is M5WtGIV
begin
/1~|jmi(
Put_Line ("Hello, world!"); 'QojSq
end Hello; (0#F]""\e
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\K~fRUo]=c
汇编语言 ;c
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aroVyUs3j
x86 CPU,DOS,TASM "%''k~UD4
MODEL SMALL &4&33D
IDEAL .#55u+d,
STACK 100H 4z%#ZIy3
rn:zKTyhw
DATASEG ?7MwTi8{F
HW DB 'Hello, world!$' tQ/
#t<4D
HJaw\zbL
CODESEG lkH;N<U
MOV AX, @data `k]!6osZo
MOV DS, AX kgapTv>q
MOV DX, OFFSET HW z<%g
#bo
MOV AH, 09H w&yGYHg
INT 21H Ocwp]Mut&
MOV AX, 4C00H x2;i<
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INT 21H .um&6Q=2<
END ^M"z1B]
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x86 CPU,GNU/Linux,NASM wp%FM
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). wK'! xH^
;Enter this into "hello.asm" then type: OssR[$69
;"nasm -f elf hello.asm" c|}K_~l_
;"ld hello.o -o hello" 0w(T^GhZ
;"./hello"
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R G0S
section .data ;data section declaration Afy .3T @)
msg db 'Hello World!',0AH VkDS&g~Ws
len equ $-msg ;string length (y~laW!
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section .text ;code section declaration mvq7G
global _start ;entry point (start of execution) P B(
_start: mov edx,len ;string length ]osx.
mov ecx,msg ;string start ]TBtLU3
mov ebx,1 ;file handle: stdout Bug}^t{M
mov eax,4 ;sys_write YYE8/\+B.
int 80h ;kernel system call hkwa ""-
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:~*r
mov ebx,0 ;return value }\f(qw
mov eax,1 ;sys_exit G_M:0YI@
int 80h ;kernel system call g6VD_
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@>G&7r:U
x86 CPU,Windows,MASM32 o"#TZB+k
.386 TD{=L*{+
.model flat,stdcall 2:iYYRrg
option casemap:none inPE/Ux
;Include 文件定义 8pk#sJ51
include windows.inc f(6UL31
include user32.inc P}hY{y'
includelib user32.lib Z.:<TrN
include kernel32.inc ~mK-8U4>K,
includelib kernel32.lib +~
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;数据段
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.data sB( `[5I
szCaption db 'A MessageBox!',0 &IRA=nJ
szText db 'Hello,world!',0 ZUXse1,
;代码段 4e+BqCriC*
.code *5y
W
start: }F{C= l2
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK G(As%r]
invoke ExitProcess,NULL ,2,SG/BB
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> XLZ j
end start B:?#l=FL
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E7gHi$
AWK -@SOo"P
BEGIN { print "Hello, world!" } <TR/ `
my ;
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BASIC &[5n0e[
传统版BASIC(例如GWBASIC): `RL,ZoYuu
j|[(*i%7|
10 PRINT "Hello, world!" ?dsf@\
20 END ?7yQ&