“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。 $.PRav
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将Hello World程序作为第一个学写的程序,现在已经成为一种传统。该程序最早出现在由Brian Kernighan和Dennis Ritchie写的计算机程序设计教程《C语言程序设计》。 dli(ckr
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以下是用不同语言写成的Hello World程序的几个例子: yw^Pok5.
Ada n1sYD6u<&
with Ada.Text_Io; use Ada.Text_Io; pbH!u+DF
procedure Hello is jIol`WX
begin ?qgQ)#6
Put_Line ("Hello, world!"); 7Ak<e tHD
end Hello; 3s6obw$ki
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汇编语言 (95|DCL
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x86 CPU,DOS,TASM r48|C{je-
MODEL SMALL f3K-X1`]'U
IDEAL 7(Fas(j3
STACK 100H mTZ/C#ir(
6TP
/0o)
DATASEG O$ *lPA[
HW DB 'Hello, world!$' 6{h\CU}"
GG%b"d-
CODESEG "#1 \ uoH
MOV AX, @data 2W,9HSu8
MOV DS, AX vV,TT%J8D
MOV DX, OFFSET HW y]db]pP5
MOV AH, 09H )UzJ2Pa<+_
INT 21H rzfLp
MOV AX, 4C00H ~; 9HGtg
INT 21H :u>RyKu|&R
END =:H-9
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x86 CPU,GNU/Linux,NASM R"B{IWQi
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). uNyU]@R<W
;Enter this into "hello.asm" then type: AdDX_\V,*
;"nasm -f elf hello.asm" c!EA>:;(<
;"ld hello.o -o hello" tOIqX0dWd
;"./hello" on_h'?2
r h*F
section .data ;data section declaration Qi18q|l8v
msg db 'Hello World!',0AH ]
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len equ $-msg ;string length 7^eyO&4z
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section .text ;code section declaration ?;XO1cs
global _start ;entry point (start of execution) Rl?1|$%
_start: mov edx,len ;string length .9J^\%JD
mov ecx,msg ;string start -CvmZ:n
mov ebx,1 ;file handle: stdout dbf<k%i6
mov eax,4 ;sys_write c8uaZvfW
int 80h ;kernel system call wWl?c
;s+/'(*
mov ebx,0 ;return value iLy^U*yK
mov eax,1 ;sys_exit s= Fp[>qA
int 80h ;kernel system call F9%_@n
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;K<VT\
x86 CPU,Windows,MASM32 wm5&5F4:
.386 I}`pY3
.model flat,stdcall )N.3Q1g-
option casemap:none )OI}IWDl
;Include 文件定义 kckRHbeU
include windows.inc ,GSiSn
include user32.inc 1Lb)S@Q`*R
includelib user32.lib <Lb LMV
include kernel32.inc lC5zqyG
includelib kernel32.lib #u&fUxM:AS
;数据段 j7}mh
.data ,=)DykP
szCaption db 'A MessageBox!',0 zluq2r
szText db 'Hello,world!',0 "Bd-h|J
;代码段 9g6$"',H
.code [ V.67_~
start: OyO<A3
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK /~,*DH$)
invoke ExitProcess,NULL }B0[S_mw
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> <"3q5ic/Z
end start [jgVN w""D
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BEGIN { print "Hello, world!" } - Jaee,P
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g QBS#NY
BASIC PQaTS*0SXJ
传统版BASIC(例如GWBASIC): dz^HN`AlzC
Gu$/rb?
10 PRINT "Hello, world!" cH_qHXi[G
20 END +`d92T z
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或在提示符输入: PzJ(Q
qiz(k:\o
?"Hello, world!":END K|%Am4
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现代版BASIC(例如Quick BASIC): $0V+<
Uu7]`U l
Print "Hello, world!" RP~nLh3=\
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以下的语句在Quick BASIC中同样有效: tA1?8`bQ
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? "Hello,world!" 6,q0F*q
u!X~!h-6~
[RBSUOF
BCPL "(=g7,I4
GET "LIBHDR" 8F[];LF>
Y -it3q'Z
LET START () BE I~l
qg
$( -6)n QNj|
WRITES ("Hello, world!*N") 'Xik2PaO
$) h,\{s_b
xP\s^]e
#$UwJ B]_D
Befunge onuG
"!dlrow olleH">v l%+ &V^:
, kqB# 9
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uO4
LD}A
3eY>LWx
Brainfuck 'xS@cFo(
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< |X@s {?
+++++++++++++++.>.+++.------.--------.>+.>. R+!U.:-yz
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;!f='QuA
C i$kB6B#==
#include <stdio.h> _|e&zr
?)9L($VVD
int main(void) )f3A\^
{ >vD}gGBe
printf("Hello, world!\n"); 2S7BzZ/
return 0; x<I[?GT=
} 3$"V,_TBZ
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