“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。 z>&|:VGG
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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》。 m|8ljXX
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以下是用不同语言写成的Hello World程序的几个例子: %fzZpd]v=,
Ada D,( "3zx
with Ada.Text_Io; use Ada.Text_Io; s0/[mAY
procedure Hello is Wf>P[6
begin iH;IXv,b3
Put_Line ("Hello, world!"); =)O%5<Lwx
end Hello; Y5&mJp\G
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汇编语言 <<iwJ
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x86 CPU,DOS,TASM jjTb:Z=.'
MODEL SMALL q"OJF'>w5
IDEAL id=:J7!QU
STACK 100H +m+v1(@
0^G5 zQlj
DATASEG xkPH_+4i8
HW DB 'Hello, world!$' JsY|Fv
!o{>[
CODESEG <5fb,@YN
MOV AX, @data &?wNL@n
MOV DS, AX mu/GOEZ5
MOV DX, OFFSET HW V!XT=Ou?6
MOV AH, 09H fa:V8xa
INT 21H ji] H|
MOV AX, 4C00H &X`zk
INT 21H LagHzCB
END ,+mH1#-3
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x86 CPU,GNU/Linux,NASM mR|;}u;d
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). mcgkNED
;Enter this into "hello.asm" then type: lq[o2\
;"nasm -f elf hello.asm" UFOUkS
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;"ld hello.o -o hello" lBN1OL[N
;"./hello" \YN(rD-
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section .data ;data section declaration w1 5QqhlK
msg db 'Hello World!',0AH Q}qw`L1
len equ $-msg ;string length 9=FqI50{
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section .text ;code section declaration _=*ph0nu
global _start ;entry point (start of execution) +"8-)'
_start: mov edx,len ;string length c1>:|D7w
mov ecx,msg ;string start eCfy'US;@3
mov ebx,1 ;file handle: stdout iI
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mov eax,4 ;sys_write ^h^\kW'#
int 80h ;kernel system call FQp@/H^
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mov ebx,0 ;return value D&C83^m
mov eax,1 ;sys_exit \:[J-ySJ
int 80h ;kernel system call ^W)h=49PN
"u=U@1 ^
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x86 CPU,Windows,MASM32 :3h'Hr
.386 = 3("gScUj
.model flat,stdcall 3{"M N=
option casemap:none fx#Krr@
;Include 文件定义 R&P}\cf8T
include windows.inc Ao}J
include user32.inc )/4xR]
includelib user32.lib 8F(Vd99I
include kernel32.inc +@5@`"Jry
includelib kernel32.lib T:?01?m
;数据段 Of?3|I3 l
.data }(-2a*Z;Y
szCaption db 'A MessageBox!',0 sQ05wAv
szText db 'Hello,world!',0 A!bH0=<I
;代码段 &E +2
.code ?K>=>bS^h
start: 'v?"TZ
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK IJ zPWs5W:
invoke ExitProcess,NULL >^|(AzS
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> AhauNS^"{R
end start }g]O_fN7~
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AWK EDAVU
BEGIN { print "Hello, world!" } y%NZ(Y,v
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BASIC @9ndr$t
传统版BASIC(例如GWBASIC): *<rBV`AP
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10 PRINT "Hello, world!" UX!)\5-
20 END g*a|QBj%
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或在提示符输入: _a[)hu8q.
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?"Hello, world!":END 2Ysl|xRo
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现代版BASIC(例如Quick BASIC): @b2JR^
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Print "Hello, world!" `j1(GQt
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以下的语句在Quick BASIC中同样有效: !^m,v19Ds<
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? "Hello,world!" `^#V1kRmH
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BCPL '"~ 2xiin
GET "LIBHDR" KDUa0$"
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LET START () BE \&Bvh4Q
$( KBSO^<7
WRITES ("Hello, world!*N") 9EI Oa/*
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Befunge L-V+ `![{
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#include <stdio.h> i*9Bu;
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int main(void) Qe,aIh
{ ER4j=O#
printf("Hello, world!\n"); $<QOMfY>
return 0; fAHf}j
} Cg 4l*"_
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C++ $Lx2!Zy
#include <iostream> nJ{vO{N
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int main() #eKg!]4-R
{ ?r"QJa>
std::cout << "Hello, world!" << std::endl; Okt0b|=`1*
return 0; BGO!c[-
} C!%\cy%Xj
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C++/CLI Jg:%|g
int main() 3|qT.QR`Z
{ hCvK2Xu
System::Console::WriteLine("Hello, world!"); R3,O;9i
} 5:W5@e{
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C# (C Sharp) Rz\:)<G
class HelloWorldApp {~u#.(
{ )CAEqP
public static void Main() THcK,`lX@
{ sH_5.+,`
System.Console.WriteLine("Hello, world!"); Z&w/JP?
} |MEu"pY)
} g E#4 3
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COBOL M}cgVMW
IDENTIFICATION DIVISION. 5:r*em
PROGRAM-ID. HELLO-WORLD. A\IQM^i
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ENVIRONMENT DIVISION. <!m'xOD
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DATA DIVISION. BZr$x8%ki
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PROCEDURE DIVISION. k.MAX8
DISPLAY "Hello, world!". MfJ8+3@K
STOP RUN. N u]&?
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