“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。 &
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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》。 _>Ln@
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以下是用不同语言写成的Hello World程序的几个例子: C*j9Iaj
Ada .WO/=#O
with Ada.Text_Io; use Ada.Text_Io; qhwoV4@f
procedure Hello is kC|Tubs(
begin f#mx:Q.7I
Put_Line ("Hello, world!"); a8NVLD>7}
end Hello; ^+a
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汇编语言 B$DZ]/<
^hysC c
x86 CPU,DOS,TASM |<2
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MODEL SMALL o#dcD?^
IDEAL #'g^Za
STACK 100H ;&7,73!
~%KM3Vap
DATASEG 9RB`$5F;
HW DB 'Hello, world!$' '2wCP
EC
kXCY))vnn
CODESEG )DRkS,I
MOV AX, @data O$(c.(_$
MOV DS, AX #'c%
MOV DX, OFFSET HW rkq)&l=ny
MOV AH, 09H _2; ^v`[
INT 21H $*i7?S@~-
MOV AX, 4C00H -+ko}He
INT 21H }Qb';-+;d
END A8mlw#`E8b
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x86 CPU,GNU/Linux,NASM hafECs
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 4D GY6PS
;Enter this into "hello.asm" then type: Y@ObwKcG
;"nasm -f elf hello.asm" Kc-4W6?$
;"ld hello.o -o hello" v#Sj|47
;"./hello" n/?eZx1
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section .data ;data section declaration u'=(&><
msg db 'Hello World!',0AH TIETj~+
len equ $-msg ;string length 0 S2v"(_T
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section .text ;code section declaration 3)xb nRk
global _start ;entry point (start of execution) 8T<@ @6`T
_start: mov edx,len ;string length >6k}HrS1V
mov ecx,msg ;string start tw-fAMwU
mov ebx,1 ;file handle: stdout yT&x`3f"i
mov eax,4 ;sys_write n{L:MT9TD
int 80h ;kernel system call SF"#\{cjj
k=ts&9\
mov ebx,0 ;return value 7}A5u,.,ht
mov eax,1 ;sys_exit =g >.X9lr
int 80h ;kernel system call Pu-p7:99;'
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Hw y5G;
x86 CPU,Windows,MASM32 CJm.K
.386 prwC>LE
.model flat,stdcall P3i^S_
option casemap:none ia_Z\q
;Include 文件定义 TbMdQbj}
include windows.inc !5?
m
include user32.inc ?Q;kZmQl
includelib user32.lib f.J9) lfb
include kernel32.inc pFEZDf}:
includelib kernel32.lib \WiqN*ZF
;数据段 Q:pzL
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.data M5F(<,n;
szCaption db 'A MessageBox!',0 gA{'Q\
szText db 'Hello,world!',0 ka!Bmv)
;代码段 LSSW.Oz2L
.code %V31B\]Nz7
start: :Jjw"}SfK#
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK gm(De9u
invoke ExitProcess,NULL amMjuyW
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> GKiq0*/M
end start {=s:P|ah
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BEGIN { print "Hello, world!" } Q!YF!WoBX
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BASIC El'yiJ
传统版BASIC(例如GWBASIC): Q,D0kS P
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10 PRINT "Hello, world!" ;]{{)dst
20 END Wx}M1&d/J
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或在提示符输入: sfyBw
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?"Hello, world!":END *wViH
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现代版BASIC(例如Quick BASIC): ] xb]8]
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Print "Hello, world!" ]{(l;k9=e
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以下的语句在Quick BASIC中同样有效: iD.0J/
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? "Hello,world!" V_Xy2<V
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o>0O@NE
BCPL 1$);V,DK!
GET "LIBHDR" c/b%T
r|l53I5
LET START () BE PP!l
$( ,wEM
Jh
WRITES ("Hello, world!*N") tB
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$) ,c@r`
x
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j \!~9
Befunge Y_$^:LG
"!dlrow olleH">v -Uzc"Lx B
, M`)s>jp@w
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4xv9a;fP
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Brainfuck )!N2'Ld
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< +xn&K"]:3
+++++++++++++++.>.+++.------.--------.>+.>. chKF6n
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W"W@WG9X0
C g4zT(,ZY
#include <stdio.h> M_qP!+Y
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int main(void) o,g6JTh
{ issT{&T
printf("Hello, world!\n"); -"2 <h:#
return 0; v;K{|zUdB
} Y*`:M(
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8dr0 DF$c
C++ P=f<#l"v
#include <iostream> F"-S~I7'L
NdM}xh
int main() 'Y hA
{ GA'*58
std::cout << "Hello, world!" << std::endl; M7`UoTc+>d
return 0; R'vdk<
} 3js)niT9u
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C++/CLI (xucZ
int main() &W&7bZ$;
{ +`Q
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System::Console::WriteLine("Hello, world!"); ;[?J5X,
} |hu"5*
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C# (C Sharp) 29R_n)ne
class HelloWorldApp j%6|:o3G(
{ F6RyOUma
public static void Main() M/n[&
{ 2Som0T<2
System.Console.WriteLine("Hello, world!"); B=Xnv*e
} zi?qK?m
} /IGrp.}
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RA*_&Ll&!C
COBOL M3hy5j(b
IDENTIFICATION DIVISION. VaD:
PROGRAM-ID. HELLO-WORLD. OwNA N
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ENVIRONMENT DIVISION. 1.hOE>A%
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DATA DIVISION. 0-8ELX[#
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[[
PROCEDURE DIVISION. `l
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DISPLAY "Hello, world!". @)aXNQY
STOP RUN. PiIp<fJd$
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Common Lisp h1Ke$#$6
(format t "Hello world!~%") 7VEt4
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DOS批处理 8.Pcr<