“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。 yo'q[YtP'
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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》。 7^`RP e^a+
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以下是用不同语言写成的Hello World程序的几个例子: Y#GT*V
Ada [>Ikitow
with Ada.Text_Io; use Ada.Text_Io; R
%Rv
procedure Hello is N=hSqw[
begin 3`mC"ab /
Put_Line ("Hello, world!"); 3AX?B~s
end Hello; N+ak[axN
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汇编语言 ~:R4))qpg
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x86 CPU,DOS,TASM \CP*i_:"
MODEL SMALL Oz_b3r
IDEAL s$IcDuBu
STACK 100H ~oEXM?M
Xcs8zT
DATASEG [^cs~
n4
HW DB 'Hello, world!$' ")fOup@ ^a
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%4o
CODESEG pb,{$A
MOV AX, @data 4Sd+"3M
MOV DS, AX /<(R
MOV DX, OFFSET HW tsCz+MP
MOV AH, 09H l6r%nHP@
INT 21H [N'r3
MOV AX, 4C00H d#x8O4S%i2
INT 21H .N?|t$J
END E&}H\zt#
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W66}\&5
x86 CPU,GNU/Linux,NASM 9aW8wYL~b
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). R4hav
;Enter this into "hello.asm" then type: 7Y| Wy
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;"nasm -f elf hello.asm" * fOS"-CL
;"ld hello.o -o hello" }W^V^i )
;"./hello" _N[^Hl`\
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section .data ;data section declaration 3JwSgc b
msg db 'Hello World!',0AH t[L2'J.5
len equ $-msg ;string length UMnR=~.
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section .text ;code section declaration %D%e:se
global _start ;entry point (start of execution) G <} 7vF
_start: mov edx,len ;string length XRX7qo(0g
mov ecx,msg ;string start /v<e$0~s<
mov ebx,1 ;file handle: stdout h8Dtq5t4
mov eax,4 ;sys_write ?h>(&HjWV
int 80h ;kernel system call BxW||O|_N"
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mov ebx,0 ;return value $i5G7b
mov eax,1 ;sys_exit LIm$Wl1U
int 80h ;kernel system call S^_JC
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x86 CPU,Windows,MASM32 arpJiG~JR
.386 8trm`?>
.model flat,stdcall bCe[nmE2
option casemap:none \oD=X}UQw(
;Include 文件定义 x3:ZB
include windows.inc #,Fx@3y\a
include user32.inc Lx4H/[$6D
includelib user32.lib l,~ N~?
include kernel32.inc # UP,;W
includelib kernel32.lib b*$o[wO9
;数据段 -NI@xJO4(;
.data &**.naSo
szCaption db 'A MessageBox!',0 i&AXPq>`
szText db 'Hello,world!',0 jb6ZAT<8
;代码段 j[Hg]
.code DVeF(Y3&
start: @Reh?]# v
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK $P1d#;rb%
invoke ExitProcess,NULL -v/?>
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> AmrJ_YP/t~
end start |\{J`5gr
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AWK [{Klv&>_/
BEGIN { print "Hello, world!" } o9(#KC?3
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BASIC f(zuRM^5
传统版BASIC(例如GWBASIC): >ZOZv
iIC9rso"Q1
10 PRINT "Hello, world!" U iPVZ@?
20 END f/|a?n2\hm
!*$'fn'bAA
或在提示符输入: |x}&wFV
bx'B;rZr
?"Hello, world!":END LXOF{FG
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现代版BASIC(例如Quick BASIC): ))we\I__8
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Print "Hello, world!" u]++&~i
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以下的语句在Quick BASIC中同样有效: q0xE&[C[M
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? "Hello,world!" wMR[*I/
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BCPL { U2|):
GET "LIBHDR" EJ[iOYx
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LET START () BE Ky{I&}+R|
$( :O_<K&
WRITES ("Hello, world!*N") 374_G?t&
$) ;Ef)7GE@\[
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\ {E;u'F
Befunge bN~'cs8 e
"!dlrow olleH">v Q'V,?#
, /E1c#@
^_@ I$sm5oL
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=,1zl}PR
Brainfuck }j5@\c48
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< I(r5\A=
+++++++++++++++.>.+++.------.--------.>+.>. S4AB tKG
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C .<|4PG
#include <stdio.h> Y$DgL
h
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int main(void) N"Nd $4
{ P^W$qy|
printf("Hello, world!\n"); x[h<3V"
return 0; ?}>B4Z)
} x[,wJzp\6
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C++ M}RFFg
#include <iostream> kv FOk
#._6lESK
int main() ]k%KTvX*G
{ pJ@DHj2@
std::cout << "Hello, world!" << std::endl; k>@^M]%
return 0; MyS7AL
} 'c\TMb.
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C++/CLI N4JL.(m){I
int main() (VF4]
{ jjlCi<9CQ^
System::Console::WriteLine("Hello, world!"); C{Xk/Er5<
} *d*;M>
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C# (C Sharp) J!gWRw5
class HelloWorldApp -O q=J;
{ 29E@e]Y,`
public static void Main() t~=@r9`S
{ IF21T
System.Console.WriteLine("Hello, world!"); G6g=F+X2
} 4OgGZ
} in|7ucSlg
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COBOL 9MlfZsby
IDENTIFICATION DIVISION. }qX&*DU_@
PROGRAM-ID. HELLO-WORLD. AZ@Zo'
Bwvc@(3v
ENVIRONMENT DIVISION. [Z&s0f1Qb
!ES#::;z?
DATA DIVISION. LR?#H)$
vnOF$6n
PROCEDURE DIVISION. 544I#!
DISPLAY "Hello, world!". u+T, n
STOP RUN.
SCC/
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Common Lisp YuW\GSV00
(format t "Hello world!~%") g?Ty5~:lq
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bI0+J)
DOS批处理 ~Am
%%$
@echo off CAObC%
echo "Hello, world!" {Ao^3vB
"f$A0RL
l.'E\3Bo
Eiffel N=Yi:+
class HELLO_WORLD }U1{&4Ph
vX )Y%I
creation ap_+C~%+
make ?B4QTx9B
feature KTREOOu .t
make is S~9kp?kR$
local w3hL.Z,kV
io:BASIC_IO G+yz8@
do B_G7F[/K
!!io ZuV
io.put_string("%N Hello, world!") s9dBXfm
end -- make !f2>6}hE
end -- class HELLO_WORLD ]$*_2V3VA$
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+:8YMM#9V
Erlang 3W
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-module(hello). >R0j<:p :
-export([hello_world/0]). ?(hQZR
0e
f
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hello_world() -> io:fwrite("Hello, World!\n"). *wx^mB9
#FM 'S|
E8 )*HOT_T
Forth ^^(ZK 6 d
." Hello, world!" CR _!Q\Xn
-$p-o
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Zdz GJ[$
Fortran 4vJIO{m
WRITE(*,10) +Uk.|@b=-V
10 FORMAT('Hello, World!') LKG|S<s
STOP tH!z7VZ
END d'J?QH!N0
+N!{(R:"v}
yXmp]9$
HTML Ct33S+y
<HTML> j;vaNg|vQ
<HEAD> 5~5ypQj
<TITLE> Hello World! </TITLE> I[Y?f8gJ
</HEAD> t;6/bT-
<BODY> >b${rgCvQ
<p>Hello World!</p> cK/odOi
</BODY> >QPS0Vx[
</HTML> \'b-;exH
D(GHkS*0q
>FhBl\oIi
HQ9+ K 6Ua~N^
H >,1LBM|0u
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T!E LH!
INTERCAL (]dZ+"O{
PLEASE DO ,1 <- #13 <H#K `|Ag
DO ,1 SUB #1 <- #238 ^ 9E(8DD
DO ,1 SUB #2 <- #112 <:o><f+
DO ,1 SUB #3 <- #112 wAPdu y[
DO ,1 SUB #4 <- #0 );LwWKa
DO ,1 SUB #5 <- #64 PUArKBYM-
DO ,1 SUB #6 <- #238 zvg&o)/[
DO ,1 SUB #7 <- #26 {S~$\4vC!
DO ,1 SUB #8 <- #248 2J <Z4Ap
DO ,1 SUB #9 <- #168 Fb-TCq1y#
DO ,1 SUB #10 <- #24 >iV(8EgBS
DO ,1 SUB #11 <- #16 IA!Kpg
W
DO ,1 SUB #12 <- #158 EeJ]>
1
DO ,1 SUB #13 <- #52 ,iy
PLEASE READ OUT ,1 k$/].P*!
PLEASE GIVE UP dy'?@Lj;
B&D
z(Bs
jz0\F,s
Java HDxw2nz*R
public class Hello &*SnDuc
{ !ZdUW]
public static void main(String[] args) .?
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{ zvj\n9H
System.out.println("Hello, world!"); ~VKXL,.
} $T0[
} 0:p#%Nvg
n!nv.-n
qa6up|xUnn
JSP L1BpY-=
<% 'z:p8"h}
out.print("Hello, world!"); 8&bj7w,K
%> #U6qM(J
mYvm_t9
<hdCO<
0(
MIXAL +J9lD`z
TERM EQU 19 the MIX console device number &B
C#u.^!
ORIG 1000 start address +f+yh0Dj
START OUT MSG(TERM) output data at address MSG =%`"
HLT halt execution zKr(Gt8
MSG ALF "MIXAL" [x,&Gwa
ALF " HELL" :SGQ4@BV
ALF "O WOR" O'(vs"eN
ALF "LD " B*7o\~5
END START end of the program N0f}q1S<-A
m~A/.t%=
\8ZNXCP
Nuva -D(!B56_
<..直接输出..> E83nEUs
Hello, world! Cz%ih#^b
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<..或者..> $G[##j2
he #iWD'
<. JZ
[&:
// 不带换行 L`v,:#Y
? "Hello, world!" q)X&S*-<o~
w93,N+es6
// 或者 !/SFEL@_B
;iVyJZI
// 带换行 2_C.-;!
?? 'Hello, world!' +Gko[<
.> 4(]k=c1<
eNX-2S
hv6>3gbr
OCaml =v-D}eJQ=
let main () = YQOGxSi
print_endline "Hello world!";; h?sh#j6
v.MWO]L
4m:E:zVn
Pascal vbp)/I-h
program Hello; $6N.ykJ
begin +]X^bB[
writeln('Hello, world!'); p*Cbe\
end. U<x3=P
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