“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。 "(\)
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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》。 Cq*}b4^;
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以下是用不同语言写成的Hello World程序的几个例子: =e!l=d|/
Ada )dIfr
with Ada.Text_Io; use Ada.Text_Io; _:Jp*z
procedure Hello is 71.\`'
begin oAZF3h]po
Put_Line ("Hello, world!"); lHKf#|
end Hello; -?YT Q@ W
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汇编语言 W\qLZuQ
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x86 CPU,DOS,TASM ImV]}M~_
MODEL SMALL h#m:Y~GoF
IDEAL $#!UGY
STACK 100H .Y(lB=pV
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DATASEG %t~SOkx
HW DB 'Hello, world!$' b WbXh$
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CODESEG U7B/t3,=U
MOV AX, @data QSF"8Uk
MOV DS, AX { 8f+h
MOV DX, OFFSET HW v"~Do+*+
MOV AH, 09H K4k~r!&OU
INT 21H M6jp1:ZH2q
MOV AX, 4C00H ![@T iM
INT 21H )v52y8G-p
END
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x86 CPU,GNU/Linux,NASM _}e7L7B7g
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). fzS`dL5,W
;Enter this into "hello.asm" then type: mGe|8In
;"nasm -f elf hello.asm" GjeUUmr
;"ld hello.o -o hello" 9:%n=U Rd
;"./hello" `D)Lzm R
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section .data ;data section declaration }{5mH:
msg db 'Hello World!',0AH jWXR__>.
len equ $-msg ;string length %0yS98']g
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section .text ;code section declaration I%9bPQ
global _start ;entry point (start of execution) 3T|Y}
_start: mov edx,len ;string length Ts(t:^
mov ecx,msg ;string start [Y$5zeA
mov ebx,1 ;file handle: stdout 3duG.iUlL
mov eax,4 ;sys_write zUs~V`0
int 80h ;kernel system call `k(u:yGK
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mov ebx,0 ;return value o#xgrMB
mov eax,1 ;sys_exit LZM,QQ
int 80h ;kernel system call ?h!t$QQ!M
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x86 CPU,Windows,MASM32 4L5o\'X
.386 ieo|%N{'
.model flat,stdcall F&QTL-pQW
option casemap:none 3ar=1_Ar
;Include 文件定义 wfxOx$]zK
include windows.inc 4l&"]9D
include user32.inc k7^R,.c@
includelib user32.lib !TP6=ks
include kernel32.inc ~n[b^b
includelib kernel32.lib =s'XR@
;数据段 I?a8h`WS+
.data ,AH0*L
szCaption db 'A MessageBox!',0 v@8S5KJ
szText db 'Hello,world!',0 L
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;代码段 _+twqi
.code 60GFVF]'2
start: 5M%,N-P^
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK G HD^%)T5^
invoke ExitProcess,NULL -<^jGrb
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> A7k'K4
end start r^$\t0h(U8
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BEGIN { print "Hello, world!" } VpkD'<