“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。 v#u]cmI
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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》。 o3*IfD
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以下是用不同语言写成的Hello World程序的几个例子: @@$=MSN
Ada #q. Q tDz
with Ada.Text_Io; use Ada.Text_Io; gbNPD*7g9
procedure Hello is n]I_LlbY
begin Fhw:@@=
Put_Line ("Hello, world!"); P7r?rbO"
end Hello; `c@KlL*!Q
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汇编语言 DArEIt6Q
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x86 CPU,DOS,TASM m)4s4P57y
MODEL SMALL AnVj
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IDEAL jG=*\lK6
STACK 100H A[L+w9
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DATASEG "-JJ6Bk
HW DB 'Hello, world!$' pnin;;D*
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CODESEG O[[:3!6q
MOV AX, @data h_6QVab@
MOV DS, AX #iD5&
klo\
MOV DX, OFFSET HW .QX|:]|n
MOV AH, 09H =&?}qa(P
INT 21H <-uE pF
MOV AX, 4C00H v|acKux=t
INT 21H C$`z23E
END l{wHu(1
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x86 CPU,GNU/Linux,NASM .um]1_= \
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). dA-ik
;Enter this into "hello.asm" then type: < V) T_
;"nasm -f elf hello.asm" R?3^Kx
;"ld hello.o -o hello" S N_!o2F2
;"./hello" ^S!^$d*
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section .data ;data section declaration ~5$V8yfx h
msg db 'Hello World!',0AH g2%&/zq/
len equ $-msg ;string length .Q
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section .text ;code section declaration -E~pCN(E
global _start ;entry point (start of execution) ~6!{\un
_start: mov edx,len ;string length !`S?
mov ecx,msg ;string start m}w~ d /
mov ebx,1 ;file handle: stdout )f]E<*k'E
mov eax,4 ;sys_write i/QE)"B"q
int 80h ;kernel system call c/.U<
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mov ebx,0 ;return value prE~GO7Z
mov eax,1 ;sys_exit :3F&NsgHH
int 80h ;kernel system call }{;m:Iia_
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x86 CPU,Windows,MASM32 lot7S XvK
.386 m=i 8o `
.model flat,stdcall X8l[B{|
option casemap:none {IEc{y7?gO
;Include 文件定义 NN1d?cOn
include windows.inc e$>.x<
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include user32.inc %lPAq
includelib user32.lib b0PqP<{ t
include kernel32.inc tcOgF:
includelib kernel32.lib F
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;数据段 &L}e&5
.data 0-#SvTf>;:
szCaption db 'A MessageBox!',0 @? 4-
szText db 'Hello,world!',0 0eq="|n^|
;代码段 O~yPe.
.code +=#sam*i
start: W6f?/{Oo8
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK [*zB
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invoke ExitProcess,NULL HFYN(nz}[
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> qPsf`nI7
end start u
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BEGIN { print "Hello, world!" } PY=(|2tb4
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BASIC fiA_6
传统版BASIC(例如GWBASIC): BeZr5I"`}
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10 PRINT "Hello, world!" x5\C MWW
20 END )G6{JL-I
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或在提示符输入: bqpy@WiI S
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?"Hello, world!":END 5Mm><"0
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现代版BASIC(例如Quick BASIC): R}lS@ w1
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Print "Hello, world!" Dd8*1,
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以下的语句在Quick BASIC中同样有效: e"HA.t[A
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? "Hello,world!" LwIl2u*
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BCPL &rs+x<
GET "LIBHDR" s0,c4y
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LET START () BE 9^ITP!~e*
$( b^b@W^\hn
WRITES ("Hello, world!*N") 0~{jgN~
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Befunge \k\ {S2SU
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#include <stdio.h> 2LS03 27
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int main(void) Z_vIGH|1
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printf("Hello, world!\n"); 297X).
return 0; Ax &Z=
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#include <iostream> ;{mKt%#
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int main() ,z A9*
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std::cout << "Hello, world!" << std::endl; ;"/[gFD5u
return 0; C+\c(M a
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C++/CLI 7Gg3$E+#*
int main() B->3/dp2c'
{ )BI6nU
System::Console::WriteLine("Hello, world!"); rH@{[~p
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C# (C Sharp) T](N
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class HelloWorldApp }6zo1"
{ Mrpz (})
public static void Main() N<&"_jzm
{ "9W]TG
System.Console.WriteLine("Hello, world!"); PvW {g5)S
} AAbI+L0m{
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