“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。 ~.FZF
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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》。 g.&n
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以下是用不同语言写成的Hello World程序的几个例子: bpQ5B'9
Ada ,:Q+>h
with Ada.Text_Io; use Ada.Text_Io; #i8] f{
procedure Hello is y rSTU-5u
begin 2=&4@c|cn
Put_Line ("Hello, world!"); ?8g*"&cn
end Hello; wVSk.OOB
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汇编语言 O0"u-UX{
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x86 CPU,DOS,TASM IfK%i/J
MODEL SMALL u~WE}VC
IDEAL n#{z"G
STACK 100H , ;'y <GA
^""Ss
DATASEG |KV|x^fJ
HW DB 'Hello, world!$' z
qM:'x*
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CODESEG Nq$Xe~,*
MOV AX, @data *Zj2*e{Z9U
MOV DS, AX /$q9
Kxb
MOV DX, OFFSET HW (1t b
MOV AH, 09H D 7D:?VoR
INT 21H h!vq~g
MOV AX, 4C00H %Sgdhgk1
INT 21H +"u6+[E
END J%Cn
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x86 CPU,GNU/Linux,NASM u%o2BLx
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). Sk~( t
;Enter this into "hello.asm" then type: mbij& 0
;"nasm -f elf hello.asm" ODggGB` H`
;"ld hello.o -o hello" *!~jHy8F
;"./hello" yF~iVt
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section .data ;data section declaration i9QL}d
msg db 'Hello World!',0AH d0b`qk @4
len equ $-msg ;string length X\Y:9^5
k*?Axk#
section .text ;code section declaration 9d\B*OU
global _start ;entry point (start of execution) ?qdZ]M4e
_start: mov edx,len ;string length /3(|P
mov ecx,msg ;string start 9XH}/FcP_O
mov ebx,1 ;file handle: stdout yV'<l
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mov eax,4 ;sys_write l2AAEB_C.
int 80h ;kernel system call Y$@?Y/rhR
xE[CNJ%t^,
mov ebx,0 ;return value B%.XWW$
mov eax,1 ;sys_exit (_9cL,v
int 80h ;kernel system call qoifzEc`U
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i uNBw]
x86 CPU,Windows,MASM32 AUan^Om
.386 iG.qMf.
.model flat,stdcall l'K3)yQEJ
option casemap:none !9n!:"(r
;Include 文件定义 :~%
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include windows.inc cNd;qO0$
include user32.inc Tej&1'G
includelib user32.lib TB8a#bK4
include kernel32.inc 'QMvj` -
includelib kernel32.lib tH}$j
;数据段 ThvVLK
.data Q9\6Pn ]T
szCaption db 'A MessageBox!',0 GWQ_X9+q
szText db 'Hello,world!',0 Dd=iYMm7
;代码段 ]Uy
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.code 8.g(&F
start: UTThl2=+
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK bR0 z$~
invoke ExitProcess,NULL Zl:Z31
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> $PNS`@B
end start G T3wJQ5N
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AWK C4`u3S
BEGIN { print "Hello, world!" } =s\RK
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BASIC !R`)S7!
传统版BASIC(例如GWBASIC): QIcg4\d%s
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10 PRINT "Hello, world!" fFBD5q(n
20 END C8J3^?7E
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或在提示符输入: ?
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?"Hello, world!":END 5z$>M3
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现代版BASIC(例如Quick BASIC): neHozmm|
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Print "Hello, world!" ] VN4;R
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以下的语句在Quick BASIC中同样有效: UT^-!L
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? "Hello,world!" WC?}a^
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BCPL 5_d=~whO&2
GET "LIBHDR" <MPoDf?h
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LET START () BE ]{[8$|Mg
$( S b9In_*
0
WRITES ("Hello, world!*N") c1,dT2:=
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Befunge g;>M{)A
"!dlrow olleH">v w'Kc#2
, &|:T+LVv$+
^_@ V<#E!MG
wc-ll&0Z
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Brainfuck h%hE$2
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< L?@TF;
+++++++++++++++.>.+++.------.--------.>+.>. A5lP%&tu(
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C +!(W>4F
#include <stdio.h> sH^?v0^a
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int main(void) "!yKX(aTX
{ &zCqF=/9U
printf("Hello, world!\n"); "hRY+{m
return 0; {(DD~~)D
} ~dIb>[7wy
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C++ brQkVt_)EE
#include <iostream> /nK)esB1L
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int main() b&$ ?.z
{ >.D0McQg
std::cout << "Hello, world!" << std::endl; C +-<
return 0; @-z#vJ5Qe{
}
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C++/CLI I#Q
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int main() {__Z\D2I
{ xM1>kbo|
System::Console::WriteLine("Hello, world!"); 4>4*4!KR}
} ~P*t_cpZ
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C# (C Sharp) nL}bCX{
class HelloWorldApp W{OlJRX8
{ WUid5e2
public static void Main() fhu-YYJt
{ &bx;GG\<4
System.Console.WriteLine("Hello, world!"); -aiQp@^/J
} |Xblz1>DF
} k]<
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lz!F{mR
COBOL Vw*;xek?
IDENTIFICATION DIVISION. Xj^6ZJc
PROGRAM-ID. HELLO-WORLD. 7z
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c=l
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ENVIRONMENT DIVISION. ,ZcW+!
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DATA DIVISION. ~UjFL~K}
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PROCEDURE DIVISION. w>T1D
DISPLAY "Hello, world!". ?@9kVB*|
STOP RUN. :X[(ymWNE
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Common Lisp Nt#zr]Fz
(format t "Hello world!~%") o#{D;'
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DOS批处理 -zg,pK$+
@echo off 58*s\*V`\
echo "Hello, world!" QBa1c-Y
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Eiffel #d%'BUde
class HELLO_WORLD y3$i?}?A
PYqx&om
creation Vb06z3"r
make ^~0Mw;n&
feature D%umL/[]
make is o)'T#uK
local Nm%&xm
io:BASIC_IO qIK"@i[
uq
do 5n1;@Vr
!!io DF'-dh</*
io.put_string("%N Hello, world!") PygT_-3z{
end -- make nnIBN4
end -- class HELLO_WORLD Mw@T!)(
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Erlang d8Jy$,/`?
-module(hello). 9 )u*IGj
-export([hello_world/0]). "K`B'/08^
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hello_world() -> io:fwrite("Hello, World!\n"). jdQ`Y+BC
n'0^l?V
z71.5n!C
Forth B;[{7J]
." Hello, world!" CR p>=YPi/d
n>jb<uz
j]}A"8=1
Fortran *}Zd QJL
WRITE(*,10) 2}>jq8Y47
10 FORMAT('Hello, World!') 0/S|P1!b
STOP ]K0<DO9
END db^S@}
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