“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。 [NCXn>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》。 iJCY /*C}
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以下是用不同语言写成的Hello World程序的几个例子: K'iS#i7
Ada bG5^h
with Ada.Text_Io; use Ada.Text_Io; T.R>xd`9
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procedure Hello is taWirqd9
begin 8"?Vcw&
Put_Line ("Hello, world!"); SgCqxFii
end Hello; /^z/]!JG:V
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汇编语言 M73VeV3DL
Y'<uZl^aX
x86 CPU,DOS,TASM FhY{;-W(T
MODEL SMALL ]Efh(Gb]
IDEAL +?"HTDBE||
STACK 100H |z!q
r}i
Q
QsVIHA
DATASEG {UX"Epd);n
HW DB 'Hello, world!$' 5bF9IH
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CODESEG G_2gKkIK-
MOV AX, @data .\ ;l-U
MOV DS, AX f7_\).T
MOV DX, OFFSET HW ="5k\1W1M
MOV AH, 09H r/N[7*i
INT 21H tAb;/tM3I
MOV AX, 4C00H IL+#ynC
INT 21H 4DQ07w
END +X* F<6mZ
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x86 CPU,GNU/Linux,NASM KA|&Q<<{@
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 27Kc-rcB
;Enter this into "hello.asm" then type: |MOn0*
;"nasm -f elf hello.asm" Xmf
;"ld hello.o -o hello"
nR,Qm=;
;"./hello" <O,'5+zG%
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section .data ;data section declaration 3JlC/v#0
msg db 'Hello World!',0AH T =eT^?v
len equ $-msg ;string length k8InbX[
2|0Je^$|
section .text ;code section declaration ;H7EB`
global _start ;entry point (start of execution) %K&+~CJE
_start: mov edx,len ;string length %mK3N2N$
mov ecx,msg ;string start L?3VyBE
mov ebx,1 ;file handle: stdout l]a^"4L4`o
mov eax,4 ;sys_write lF;ziF
int 80h ;kernel system call =Q/w% 8G
W; 3
R;
mov ebx,0 ;return value Qag|nLoT
mov eax,1 ;sys_exit ;x!,g5q"q
int 80h ;kernel system call E<D+)A
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x86 CPU,Windows,MASM32 O tXw/
.386 1zb$5 {,|
.model flat,stdcall !XgQJ7y_Z
option casemap:none +?URVp
;Include 文件定义 ;eS;AHZ
include windows.inc >%iu!H"
include user32.inc %-@'CNP
includelib user32.lib rtB|N-
include kernel32.inc t Y:G54d=_
includelib kernel32.lib hrJ$%U
;数据段 9O),/SH;:
.data g>6:CG"
szCaption db 'A MessageBox!',0 HO266M
szText db 'Hello,world!',0 [b7it2`dl
;代码段 B]'e$uyL7
.code q6;OS.f
start: KcIc'G 9
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK +
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invoke ExitProcess,NULL O]e6i%?
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> )HJK '@
end start 7^kH8qJ)
RtW4n:c
$?H]S]#|}.
AWK M?E9N{t8)a
BEGIN { print "Hello, world!" } H/cs_i
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BASIC xT{TVHdU
传统版BASIC(例如GWBASIC): '4af
],
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10 PRINT "Hello, world!" &E.OyqGZV
20 END !d:tIu{)
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或在提示符输入: TZ^{pvBy
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?"Hello, world!":END pWMiCXnW
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现代版BASIC(例如Quick BASIC): 5T!&r
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Print "Hello, world!" 3cmbK
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以下的语句在Quick BASIC中同样有效: Y Eg
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? "Hello,world!" "AT&!t[J
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BCPL 11i"nR|
GET "LIBHDR" 8&?^XcJ*x
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LET START () BE @; W<dJ<X
$( ceqFQ
WRITES ("Hello, world!*N") E2>im>p
$) t@X M /=d
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TAXd,z N
Befunge 9 1BY]N
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cYsR0#
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Brainfuck ^%-NPo<
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< G=vN;e_$_b
+++++++++++++++.>.+++.------.--------.>+.>. x2Ha&
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C RwUW;hU
#include <stdio.h> wUbmzP.
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int main(void) >r~0SMQr
{ #X4LLS]VV
printf("Hello, world!\n"); a a4$'8s
return 0; LOe4c0C6Ca
} ,xYg
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C++ TLy;4R2Nn
#include <iostream> &q.)2o#Q.
h!QjpzQe
int main() x]H3Y3
{ 'T%IvJ#Xu
std::cout << "Hello, world!" << std::endl; O2C6V>Q;
return 0; ri,2clp
} Xe)Pg)J1
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C++/CLI n:F@gZd`
int main() $,!hD\a
{ p#)e:/Qy
System::Console::WriteLine("Hello, world!"); ,Ie<'>hd
} tzZ|S<e6=\
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C# (C Sharp) &.hoCPo$
class HelloWorldApp S
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{ )#C_mB$-#
public static void Main() sb'lZFSP~s
{ ohtT
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System.Console.WriteLine("Hello, world!"); E{<?l 7t
} ehU"*9
} ;
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COBOL *}7U`Aa
IDENTIFICATION DIVISION. 4yhcK&
PROGRAM-ID. HELLO-WORLD. O(odNQy~
: sFo
ENVIRONMENT DIVISION. &ryiG
0"4J"q]&
DATA DIVISION. 5H~@^!7t
>;m{{nj
PROCEDURE DIVISION. (:JjQ`i
DISPLAY "Hello, world!". )q^(T1
STOP RUN. 0Qt~K#mr/
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3zbXAR*
Common Lisp -W9gH
(format t "Hello world!~%") 9g96 d-
m.!wsw
jBS'g{y-!
DOS批处理 R^uc%onP
@echo off \`
&ej{
echo "Hello, world!" D6Dn&/>Zp
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!1("(Eb
Eiffel _$!`VA%
class HELLO_WORLD pVY4q0@
SGQDro=l
creation Jlz9E|*qV
make <W?WUF
feature 7O"hiDQ
make is &h\7^=s.
local _OLI%o
io:BASIC_IO 'g2vX&=$A
do s_TD4~
$
!!io 9+t=|
io.put_string("%N Hello, world!")
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end -- make (N7O+3+G
end -- class HELLO_WORLD ve6x/ PD
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#.o0mguU
Erlang 4Q$!c{Y
r
-module(hello). 2!BsEvB(
-export([hello_world/0]). 6oYIQ'hc
/ xs9.w8-
hello_world() -> io:fwrite("Hello, World!\n"). 7pz\ScSe
G#|Hu;C6"
K0LbZMn,/
Forth .5]{M\aA
." Hello, world!" CR 4'` C1 a
jK e.gA
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Fortran u|T%Xy=LU
WRITE(*,10) Fk aXA.JE
10 FORMAT('Hello, World!') !M,h79NM
STOP qZ&