“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。 `g,8-
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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》。 ce6__f5?
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以下是用不同语言写成的Hello World程序的几个例子: BAO| )~1Pd
Ada pNRk.m]
with Ada.Text_Io; use Ada.Text_Io; U!m@DJj
procedure Hello is O=9-Qv|
begin m5Tr-w$QY
Put_Line ("Hello, world!"); PpsIhMq@
end Hello; ~l2aNVv;
S'HnBn /
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汇编语言 { m|pl
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x86 CPU,DOS,TASM N&[D>G]>v
MODEL SMALL 4Yl;
IDEAL sm$(Y.N
STACK 100H # M!!CX*k
^3hn0DVQ
DATASEG =LTmr1?
HW DB 'Hello, world!$' {6oE0;2o'
-[qq(E
CODESEG (
9]_ HW[
MOV AX, @data eX_D/25 $
MOV DS, AX t5[[JD1V
MOV DX, OFFSET HW 4Bl{WyMJ |
MOV AH, 09H _f6HAGDN
INT 21H 1@gg uRF:
MOV AX, 4C00H e${>#>
INT 21H mR;qMX)0h
END #6!5 2
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HV/c c"
x86 CPU,GNU/Linux,NASM I=;+n-
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). TT9z_Q5~
;Enter this into "hello.asm" then type: 4 QZ?}iz
;"nasm -f elf hello.asm" DD44"w_9
;"ld hello.o -o hello" S\CRG>
;"./hello" )a3IQrf=
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section .data ;data section declaration !`mZ0c+
msg db 'Hello World!',0AH 0<TD/1wN
len equ $-msg ;string length X w .p
=YG _z^'
section .text ;code section declaration MC&\bf
global _start ;entry point (start of execution) +w8R!jdA
_start: mov edx,len ;string length v2,%K`pAU
mov ecx,msg ;string start +-B^Z On
mov ebx,1 ;file handle: stdout H\1qI7N C
mov eax,4 ;sys_write <58l;<0
int 80h ;kernel system call "KJ%|pg_C
8J)xzp`*)
mov ebx,0 ;return value kcDyuM`
mov eax,1 ;sys_exit t!K*pM
int 80h ;kernel system call }CxvT`/
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x86 CPU,Windows,MASM32 -{
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.386 r ]>\~&?^F
.model flat,stdcall VGqa)ri"
option casemap:none $W;b{H=F
;Include 文件定义 ^2]LV6I
include windows.inc umLb+GbI4
include user32.inc gN {'UDg
includelib user32.lib Dr;iQkGP
include kernel32.inc L_em')
includelib kernel32.lib ]4 (?BJ
;数据段 joul<t-
.data US{3pkr;I]
szCaption db 'A MessageBox!',0 $OVXk'cc
szText db 'Hello,world!',0 NcCvm#
;代码段 AnZclqtb
.code htP|3 B
start: ^Y{D^\},
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK S=3^Q;V/1
invoke ExitProcess,NULL _#o'
+_Z
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> yg]2erR
end start YDmWN#
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nW?R"@Zm
AWK ?*r!{3T ,u
BEGIN { print "Hello, world!" } nT#JOmv
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BASIC 2>em0{e
传统版BASIC(例如GWBASIC): bl/,*Wx:4.
N]5m(@h
10 PRINT "Hello, world!" + E"[
20 END 8O1K[sEjui
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或在提示符输入: VSOz.g>
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?"Hello, world!":END (sw-~U%
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现代版BASIC(例如Quick BASIC): 5|$a =UIR
[;O^[Iybf:
Print "Hello, world!" p
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以下的语句在Quick BASIC中同样有效: |s gXh9%x<
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? "Hello,world!" >qT 'z$
&d`^E6#
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BCPL ^&c$[~W
GET "LIBHDR" cQpnEO&SL
+_HdX
w#
LET START () BE N
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$( iRmQ5ezk
WRITES ("Hello, world!*N") kRIB<@{
$) fAj2LAK
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Befunge ?)tK!'
"!dlrow olleH">v sM\&.<B
, w! q&
^_@ ,&a`d}g&G
}WP-W
r!/0 j)
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++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< r25Z`X Z
+++++++++++++++.>.+++.------.--------.>+.>. K^i"9D)A
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q/6UK =
C ]O!s'lC
#include <stdio.h> oP$kRfXS!<
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int main(void) C%H9[%k
{ 4'At.<]jL
printf("Hello, world!\n"); {},;-%xE
return 0; No W!xLI
} 2Ug.:![
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C++ I($,9|9F
#include <iostream> y1(P<7:t?
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int main() /(%Ig,<"JC
{ +J40wFI:y
std::cout << "Hello, world!" << std::endl; Tt6{WDscZ
return 0; IrO+5 w
} p5SX1PPQ
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t.z$j
C++/CLI :,C%01bH|l
int main() +{&+L0DfH~
{ tP]q4i
System::Console::WriteLine("Hello, world!"); ?Y!U*& 7
} <P pYl
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k|ip?O
C# (C Sharp) W8.j/K:
class HelloWorldApp .wri5
{ T:#S86m
public static void Main() Zi3T~:0p:
{ 9%TT>2#
System.Console.WriteLine("Hello, world!"); j1F w
U
} V* Qe5j9
} {jG.=}/Dk
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COBOL !Ud:?U
IDENTIFICATION DIVISION. K!7q!%Ju
PROGRAM-ID. HELLO-WORLD. w7ZG oh(
fn?VNZ`J
ENVIRONMENT DIVISION. \CtQ*[FmN
%ph"PR/t?
DATA DIVISION. GMTor
:s-EG;.
PROCEDURE DIVISION. ~%KM3Vap
DISPLAY "Hello, world!". E4i@|jE~)
STOP RUN. B{=009.
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rkq)&l=ny
Common Lisp W1<