“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。 C\dQ6(3}\
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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》。 +cM; d4
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以下是用不同语言写成的Hello World程序的几个例子: D4G*K*z,w4
Ada &D[dDUdHs
with Ada.Text_Io; use Ada.Text_Io; KM< +9`
procedure Hello is YTQ|Hg6jO
begin D; H</5#Q
Put_Line ("Hello, world!"); ^i&/k
end Hello; rw8O<No4.o
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PV(bJ7&R
汇编语言 9fMg?
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x86 CPU,DOS,TASM 9z\q_0&i
MODEL SMALL t#MU2b
IDEAL c)#b*k,lw<
STACK 100H M:6H%6eT
"w=p@/C
DATASEG DUEA"m h
HW DB 'Hello, world!$' U# Y?'3 :
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CODESEG f'\I52;FB
MOV AX, @data {}N* e"<O
MOV DS, AX Kl{2^q>
MOV DX, OFFSET HW ,AGK O,w
MOV AH, 09H =r3Yt9
INT 21H !;pmql
MOV AX, 4C00H V%dMaX>^i
INT 21H LPb43
END p]*$m=t0r
r.xGvo{iY
Vm_y,;/(-R
x86 CPU,GNU/Linux,NASM 8\!0yM#yK
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). Q/\
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;Enter this into "hello.asm" then type: IpGq_TU
;"nasm -f elf hello.asm" fC.-* r
;"ld hello.o -o hello" 4o9#B:N]J
;"./hello" hz<kR@k}
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section .data ;data section declaration WTA0S}pT
msg db 'Hello World!',0AH wWY6DQQB
len equ $-msg ;string length fU!C:
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section .text ;code section declaration I|m fr{
global _start ;entry point (start of execution) %<O'\&!,
_start: mov edx,len ;string length 7.CzS
mov ecx,msg ;string start {3yzC
mov ebx,1 ;file handle: stdout pwT|T;j*
mov eax,4 ;sys_write >wej1#\3
int 80h ;kernel system call kGc;j8>."
K_ Y0;!W
mov ebx,0 ;return value H&[ CSc
mov eax,1 ;sys_exit A;1<P5lo
int 80h ;kernel system call gEIjG
Cq
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x86 CPU,Windows,MASM32 -0YS$v%au>
.386 0@C`QW%m
.model flat,stdcall g % q7
option casemap:none ppN96-]^0
;Include 文件定义 |q^e&M<
include windows.inc rVzjLkN^
include user32.inc P-K\)65{Y
includelib user32.lib #~I%qa"_pa
include kernel32.inc uKo)iB6D
includelib kernel32.lib _jy*`$"q(
;数据段 !lm^(SSv
.data q-/A_5>!;f
szCaption db 'A MessageBox!',0 tQ5gmj
szText db 'Hello,world!',0 L7G':oA_`p
;代码段 .MhZ=sn
.code qeQTW@6
F
start: <4^ _dJ9=
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK Cj"k
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invoke ExitProcess,NULL #AyM!
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> @bmu4!"d
end start {[hV['Awv
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/(BQzCP9O;
AWK V7N8m<Tf
BEGIN { print "Hello, world!" } {{ R/:-6?@
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BASIC NAZxM9
传统版BASIC(例如GWBASIC): ~/!Zh
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10 PRINT "Hello, world!" 6JmS9ho
20 END ORs<<H.d
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或在提示符输入: ZWG$MFEjl
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?"Hello, world!":END =9i:R!,W
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现代版BASIC(例如Quick BASIC): 1oFU4+{ 4
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Print "Hello, world!" {}D8Y_=9\
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以下的语句在Quick BASIC中同样有效: ul(1)q^
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? "Hello,world!" k^ B'W{
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x7L$x=8s
BCPL YMIDV-
GET "LIBHDR" (toGU
bo <.7
LET START () BE l4O}>#
$( I= x
WRITES ("Hello, world!*N") pHsp]a
$) %~4R)bsJ'
7xVI,\qV
bo$xonV @y
Befunge b}9K"GT
"!dlrow olleH">v Xleoh2&M
, :)q/8 0@
^_@ r*>XkM& M
#`:60#l
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Brainfuck Al$"k[-Uin
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< x,2+9CCU
+++++++++++++++.>.+++.------.--------.>+.>. O2:m)@
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d}>Nl$
C jXGr{n
#include <stdio.h> )qn
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int main(void) }qmZ
{ ?)",}XL6
printf("Hello, world!\n"); R{8nR00|1
return 0; 3`n5[RV
} 3+{hO@O
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C++ 5A7!Xd
#include <iostream> 'iXjt
MX
Mn7 y@/1
int main() wI
#_r_
{ }qc[ysDK]
std::cout << "Hello, world!" << std::endl; H }uT'
return 0; >pv~$
} +{]/
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b-M[la}1"
l#~Sh3@L(
C++/CLI t<|=-
int main() fF_1ZKx+#!
{ )}~k7bb}Y
System::Console::WriteLine("Hello, world!"); V*5:Vt7N
} .m;1V6
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C# (C Sharp)
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class HelloWorldApp +m:U9K(\h
{ +_Fsiu_b
public static void Main() 5|r3i \
{ 8$v17 3
System.Console.WriteLine("Hello, world!"); P;MS%32
} fk*JoR.o
} >f'nl
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COBOL WT'P[RU2
IDENTIFICATION DIVISION. lLmVat(
PROGRAM-ID. HELLO-WORLD. ? RB~%^c!
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ENVIRONMENT DIVISION. MO9}Itg
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DATA DIVISION. _UjAct]6
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PROCEDURE DIVISION. <C+:hsS=
DISPLAY "Hello, world!". {8@?9Z9R{
STOP RUN. .Z8 x!!Q*
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