“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。 SuU_psF
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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》。 DZI:zsf;5Q
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以下是用不同语言写成的Hello World程序的几个例子: ~:\QC
Ada Pgg\(D#X`
with Ada.Text_Io; use Ada.Text_Io; ub0uxvz
procedure Hello is gI SP .
begin >5Rcj(-&l
Put_Line ("Hello, world!"); NlS/PWc6(
end Hello; ]
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汇编语言 c[~LI<>ic
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x86 CPU,DOS,TASM "
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MODEL SMALL )d\u_m W^
IDEAL dMnJ)R
STACK 100H ?Q]{P]
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DATASEG !6UtwCVR
HW DB 'Hello, world!$' o`8dqP
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CODESEG e /4{pe+,
MOV AX, @data 9{;cp?\)M
MOV DS, AX +v`?j+6z
MOV DX, OFFSET HW F( w
MOV AH, 09H Wx<fD()
INT 21H ^" EsBt
MOV AX, 4C00H KAucSd`
INT 21H jJxV)AIY
END Gqz<;y
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#=G[~m\
x86 CPU,GNU/Linux,NASM 9,4Lb]
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). LXIQpD,M
;Enter this into "hello.asm" then type: cnUYhxE+s
;"nasm -f elf hello.asm" 8$H_:*A?
;"ld hello.o -o hello" d3$&I==;:
;"./hello"
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section .data ;data section declaration 5jTBPct
msg db 'Hello World!',0AH Aqwjs
3
len equ $-msg ;string length B4yC"55
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section .text ;code section declaration >>ncq$
global _start ;entry point (start of execution) lAxbF
_start: mov edx,len ;string length 0
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mov ecx,msg ;string start r
pv`%
mov ebx,1 ;file handle: stdout gRk%ObJGqm
mov eax,4 ;sys_write |-W7n'n
int 80h ;kernel system call OKo39 A\fu
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mov ebx,0 ;return value i,{'}B
mov eax,1 ;sys_exit _\9|acFT2O
int 80h ;kernel system call q\P"AlpC!
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fI5]ed eS
x86 CPU,Windows,MASM32 ]ZQ3|ZJ?<
.386 "QWF&-kAI
.model flat,stdcall =,/08Cs
option casemap:none D{]t50a.
;Include 文件定义 &vf%E@<
include windows.inc +wAH?q8f
include user32.inc v[r5!,F
includelib user32.lib Kd?TIeF E
include kernel32.inc G\y: O9(
includelib kernel32.lib qH3|x08
;数据段 S}/?Lm}
.data ?Mb'l4
szCaption db 'A MessageBox!',0 8b0!eB#_Ee
szText db 'Hello,world!',0 !ys82
;代码段 4xg7oo0iJ
.code /.'tfy$
start: s<i& q {r
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK BM(8+Wj
invoke ExitProcess,NULL ]}3AP!:
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> zHI_U\"8D
end start =@ '>|-w|
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BEGIN { print "Hello, world!" } S1iF1X(+?X
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BASIC y~.k-b<{[
传统版BASIC(例如GWBASIC): 6;02_C]\o
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10 PRINT "Hello, world!" bZ-"R 6a$
20 END #}/YnVk
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或在提示符输入: vtvF)jlX
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?"Hello, world!":END ionFPc].
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现代版BASIC(例如Quick BASIC): 1@&i
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Print "Hello, world!" 8X6F6RK6,1
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以下的语句在Quick BASIC中同样有效: W6_~.m"b
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? "Hello,world!" <5R`E(
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BCPL 7oPLO(0L
GET "LIBHDR" C@{#OOa
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LET START () BE v"y0D
$( 0b)^#+
WRITES ("Hello, world!*N") FT*OF 3
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Befunge -^C't_Q o
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, ^BDM'
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Brainfuck V/X4WZs|i
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< k<aKT?Ek>
+++++++++++++++.>.+++.------.--------.>+.>. y\=(;]S'
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C \+]U1^
#include <stdio.h> 5_bIc=L1
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int main(void) -Wp69DP6q
{ bPaE;?m
printf("Hello, world!\n"); ;.Lf9XJ
return 0; p$>e{-u
} 4 1w*<{Lk
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C++ +~gqPk
#include <iostream> _R&}CP
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int main() l>l)m-;O
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std::cout << "Hello, world!" << std::endl; 3kAmRU
return 0; ?^F*M#%?
} Kk5 vC{
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C++/CLI ?vHow$
int main() 4>q^W $
{ PV_E3,RY
System::Console::WriteLine("Hello, world!"); q1 :Y]Rbe
} G~,K$z/-l
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C# (C Sharp) 5hNjJqu
class HelloWorldApp 1J}i :i&
{ )_*<uSl
public static void Main() d2b L_
{ +UzFHiGy#
System.Console.WriteLine("Hello, world!"); ]SNA2?q
} ZTCzD8
} d3A= (/>D
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COBOL #St=% !
IDENTIFICATION DIVISION. x/nlIoT
PROGRAM-ID. HELLO-WORLD. 8"!Z^_y)
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ENVIRONMENT DIVISION. "AN2K
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DATA DIVISION. ]B;GU
./_o+~\e'
PROCEDURE DIVISION. W)3IS&;P
DISPLAY "Hello, world!". @agW{%R:.
STOP RUN. uZsm=('ww
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Common Lisp b 9M.p*!
(format t "Hello world!~%") Q'f!392|
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DOS批处理 &^ECQ
@echo off X[L6Av
echo "Hello, world!" ISHNeO8
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Eiffel l_ycYD$ZA
class HELLO_WORLD O34'c_ fZ
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creation R[eQ}7;+
make Evd>s
feature <8UqV.&
make is "%O,*t
local w(w%~;\kLP
io:BASIC_IO d4"KM+EP?
do 3kxI'0&T
!!io D]+0X8@kH7
io.put_string("%N Hello, world!")
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end -- make SvUC8y
end -- class HELLO_WORLD Am~ NBQ7
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Erlang K&(}5`H0=
-module(hello). 5#~ARk*?a
-export([hello_world/0]). SB#YV
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hello_world() -> io:fwrite("Hello, World!\n"). PV?XpT
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Forth !"u) `I2
." Hello, world!" CR Nrl&"IK|J
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Fortran WNkAI9B
WRITE(*,10) qzv$E;zAl
10 FORMAT('Hello, World!') g%z?O[CN
STOP r>+Hwj0>
END H \$04vkR
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