“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。 !0vG|C;'
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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》。 'LO^<
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以下是用不同语言写成的Hello World程序的几个例子: 2fWTY0
Ada `wDl<[V
with Ada.Text_Io; use Ada.Text_Io; "-vW,7y
procedure Hello is f PM8f
begin *U
P@9D
Put_Line ("Hello, world!"); EV*IoE$W]=
end Hello; _N{RVeO
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汇编语言 n}!PO[m~
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x86 CPU,DOS,TASM v~@pMA$(h
MODEL SMALL V{:A3C41
IDEAL USM4r!x
STACK 100H xUa{1!Y8
YLiSbLz1
DATASEG @Bf%s(Uj+
HW DB 'Hello, world!$' `Ch9~*p
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CODESEG SV~cJ]F
MOV AX, @data q)^Jj?W
MOV DS, AX A m>cd;
MOV DX, OFFSET HW Fd[zDz
MOV AH, 09H jhb6T ?}
INT 21H 3%(N[&LU
MOV AX, 4C00H id2j7|$,
INT 21H {z")7g ]l
END -bSSP!f
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x86 CPU,GNU/Linux,NASM }wHW7SJ
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 6{^E{go
;Enter this into "hello.asm" then type: Is{KN!Hw
;"nasm -f elf hello.asm" 5*,f
Fib
;"ld hello.o -o hello" L 8dc(Z%v
;"./hello" &8g?4v
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section .data ;data section declaration 8q,6}mV
msg db 'Hello World!',0AH <cqbUL
len equ $-msg ;string length A*}.EClH
Dk(1}%0U/
section .text ;code section declaration \kU &^Hi
global _start ;entry point (start of execution) s#)5h0t#du
_start: mov edx,len ;string length <7j87
mov ecx,msg ;string start BA%pY|"Q
mov ebx,1 ;file handle: stdout --|Wh^i>?
mov eax,4 ;sys_write WYEKf9}
int 80h ;kernel system call k6sI
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}Du}c3
mov ebx,0 ;return value 'i4_`^:+
mov eax,1 ;sys_exit ,Qe?8En[
int 80h ;kernel system call tm#nU w
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#nK>Z[
x86 CPU,Windows,MASM32 X0haj~o[
.386 '~&9D:(
.model flat,stdcall #py[
option casemap:none |ayVjqJ*
;Include 文件定义 YQ6f}O
include windows.inc @!yMIM%P
include user32.inc vA]W|sLF9
includelib user32.lib q gLaa
include kernel32.inc Pl"Nus
includelib kernel32.lib =p=rg$?
;数据段 d\
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.data qT`k*i?
szCaption db 'A MessageBox!',0 :F{:Z*Fi0
szText db 'Hello,world!',0 ;I}kQ!q
;代码段 q(.:9A*0
.code b;cdIl!3
start: !,Va(E|=
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK X@LRsg
invoke ExitProcess,NULL -/ g B|J
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CJJzCVj
end start :QB<?HaS'
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b/{t|io{
AWK .tzG_
BEGIN { print "Hello, world!" } :]^P1sH[
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BASIC ~XWQhIAM4
传统版BASIC(例如GWBASIC): lJis~JLd`
;[u%_
10 PRINT "Hello, world!" obNqsyc77R
20 END p|&Yku=
2L} SJUk*
或在提示符输入: g#t[LI9(F[
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c[Q($K
?"Hello, world!":END \V*xWS
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现代版BASIC(例如Quick BASIC): 1r]IogI
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Print "Hello, world!" {yB&xj[z
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以下的语句在Quick BASIC中同样有效: $l|qk z
HLZ;8/|48m
? "Hello,world!" 3T!lA
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