“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。 (ni$wjq=z^
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将Hello World程序作为第一个学写的程序,现在已经成为一种传统。该程序最早出现在由Brian Kernighan和Dennis Ritchie写的计算机程序设计教程《C语言程序设计》。 )+G(4eIT
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以下是用不同语言写成的Hello World程序的几个例子: =bzTfki
Ada w <ID<
with Ada.Text_Io; use Ada.Text_Io; [I9d
procedure Hello is <3bh-)
begin C*9m `xh
Put_Line ("Hello, world!"); vC7sJIch2<
end Hello; ZttL*KK
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汇编语言 ec=C7M
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x86 CPU,DOS,TASM zM!*r~*k$
MODEL SMALL Fi#t88+1
IDEAL <O WPG,
STACK 100H R Mm`<:H_
T^'i+>F!w
DATASEG ziOmmL(r
HW DB 'Hello, world!$' :97`IV%
T2dpn%I
CODESEG O6pjuhMx
MOV AX, @data &~&i >
MOV DS, AX -4]6tt'G
MOV DX, OFFSET HW :\[F=
MOV AH, 09H + y^s
6j}
INT 21H ^o 5q- ;a
MOV AX, 4C00H pkoHi'}} $
INT 21H ^:],JN
k
END J L3A/^
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x86 CPU,GNU/Linux,NASM nxt1Y04,H
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). -zkB`~u_
;Enter this into "hello.asm" then type: =mZw71,
;"nasm -f elf hello.asm" /vMpSN|3
;"ld hello.o -o hello" c2C8}XJ|O
;"./hello" g#AA.@/Z
rT#QA=YB
section .data ;data section declaration |] YT6-?.
msg db 'Hello World!',0AH ;i]cmy
len equ $-msg ;string length R
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5s>9v
section .text ;code section declaration A1C@'9R*
global _start ;entry point (start of execution) &jJgAZ!
_start: mov edx,len ;string length q\,H9/.0k
mov ecx,msg ;string start Ov9.qNT
mov ebx,1 ;file handle: stdout NF.SGga
mov eax,4 ;sys_write l^_X?L@
int 80h ;kernel system call g41LpplX
Gc'HF"w
mov ebx,0 ;return value !cpBX>{w
mov eax,1 ;sys_exit >|s=l`"Xz
int 80h ;kernel system call (ZnA#%
0nS6<:
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x86 CPU,Windows,MASM32 hYV{N7$U|
.386 Cfj*[i4
.model flat,stdcall ?`vb\K<5H;
option casemap:none wFvilF
V
;Include 文件定义 4k#6)e
include windows.inc }vi%pfrB
include user32.inc M3Z yf
includelib user32.lib 6k[u0b`
include kernel32.inc S `[8TZ
includelib kernel32.lib aX|`G]PhdI
;数据段 OjCT%6hy;
.data _Sg29qFK
szCaption db 'A MessageBox!',0 YmwVa
s
szText db 'Hello,world!',0 _EY:vv
;代码段 qgDBu\
.code 1pn167IQL
start: AL;"S;8
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK rQWft r^
invoke ExitProcess,NULL JUE>g8\b
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> kO.rgW82
end start ._yr7uY[M
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BEGIN { print "Hello, world!" } 'e&4#VLH^
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:!/}*B
BASIC <Z&gAqj 2
传统版BASIC(例如GWBASIC): N>~*Jp2;
fSTEZH
10 PRINT "Hello, world!" nuQ"\ G
20 END ij TtyTC
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或在提示符输入: j)uIe)wZw
9\xw}ph
?"Hello, world!":END 4?&=H
*H:
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现代版BASIC(例如Quick BASIC): &a0%7ea`.S
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Print "Hello, world!" '%MIG88
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以下的语句在Quick BASIC中同样有效: D|S)/o6
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? "Hello,world!" xs:{%ki
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FYj3!
H
BCPL we@bq,\w
GET "LIBHDR" |amEuKJ
R|vF*0)>W
LET START () BE H(X~=r
$( <omz9d1
WRITES ("Hello, world!*N") ks{s
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$) \kRBJ1)|f
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ZDb`]c4(
Befunge $?A]!Y;
"!dlrow olleH">v J
h"]iN
, <HD/&4$[
^_@ QSLDA`
w\M_3}
v6rw.
Brainfuck <s:Xj
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< HP8pEo0Y
+++++++++++++++.>.+++.------.--------.>+.>. vxgm0ZOMN
~\^8
^
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C 7KEGTKfW
#include <stdio.h> I2 Kb.`'!
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int main(void) 0uvL,hF
{ M]2 c-
printf("Hello, world!\n"); 7%<jZ=
return 0; 2.[qcs3zl
} spI{d!c
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zf!c
C++ lN&GfPP6
#include <iostream> zEGwQp<
gV7o
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int main() 4rx|6NV6
{ {L0w&~$Fy
std::cout << "Hello, world!" << std::endl; tY#^3ac
return 0; xq{4i|d)
} '=2t(@aC
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C++/CLI ^Nu} HcC+
int main() (UM+?]Qwy
{ ?R+$4;iy
System::Console::WriteLine("Hello, world!"); Jq!($PdA
} k9,"`dk@
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C# (C Sharp) aZ^lI
6@+4
class HelloWorldApp gu/Yc`S[
{ aJF`rLm
public static void Main() MnQ_]cC
{ i!iODt3k
System.Console.WriteLine("Hello, world!"); v!uLd.(
} pg<>Ow5,~l
}
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e,BJD>N ?
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COBOL bcYz?o6
IDENTIFICATION DIVISION. |(V3
PROGRAM-ID. HELLO-WORLD. -bE|FFU
>"[u.1J_'I
ENVIRONMENT DIVISION. n >Ei1
fP|\1Y?CS
DATA DIVISION. dO@iq^9-
9~_6mR<
PROCEDURE DIVISION. EAfSbK3z
DISPLAY "Hello, world!". u|ZO"t
STOP RUN. 3LmHH
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Common Lisp V;V9_qP,
(format t "Hello world!~%") c1^3lgPv
p
c],H
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DOS批处理 (07d0 <<[
@echo off "duJl-
echo "Hello, world!" ,Tx8^|b#F
K+\hv~+@
_=] FJhO
Eiffel |?>h$'
class HELLO_WORLD tu'M YY
l.BNe)1!22
creation DH^^$)
make 8vo}
.JIl
feature erqB/ C
make is UO wNcY
local !S:@x.n@iR
io:BASIC_IO IFY!3^;zO
do K"1J1>CHQ
!!io cMv3` $
io.put_string("%N Hello, world!") UQFuEI<1-
end -- make @oEDtN
end -- class HELLO_WORLD mAzW'Q4D
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Erlang R32d(2%5K
-module(hello). z-DpLV
-export([hello_world/0]). dUZ&T