“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。 *owU)
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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》。 5M_H
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以下是用不同语言写成的Hello World程序的几个例子: #D|p2L$
Ada |)G<,FJQE_
with Ada.Text_Io; use Ada.Text_Io; Xry47a
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procedure Hello is RFH0
begin {BHO/q3
Put_Line ("Hello, world!"); G#1GXFDO{
end Hello; PxE3K-S)G
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汇编语言 b u"!jHPB
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x86 CPU,DOS,TASM ~v"L!=~G;a
MODEL SMALL 1i] ^{;]
IDEAL ZAf7Tz\U
STACK 100H fxIf|9Qi`
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DATASEG snikn&
HW DB 'Hello, world!$' i 3SHg\~Z
2:=
CODESEG ,v&(Y Od
MOV AX, @data 4Z,!zFS$`
MOV DS, AX _-F s#f8
MOV DX, OFFSET HW CWS4lx
MOV AH, 09H 4H<lm*!^
INT 21H 2Wb]4-
MOV AX, 4C00H F}qc0
INT 21H a@*\o+Su
END T,tdL
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x86 CPU,GNU/Linux,NASM +2j AC r
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). BF <ikilR
;Enter this into "hello.asm" then type: {qMIGwu
;"nasm -f elf hello.asm" !?gKqx'T$
;"ld hello.o -o hello" 2 Vrw
;"./hello" 1'\/,Es
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section .data ;data section declaration .6'qoo_N
msg db 'Hello World!',0AH NN`uI6=
len equ $-msg ;string length Tu 7QCr5*
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section .text ;code section declaration O8.5}>gDn.
global _start ;entry point (start of execution) i7>tU=
_start: mov edx,len ;string length r0gJpttDl
mov ecx,msg ;string start ?3xzd P
mov ebx,1 ;file handle: stdout t<viX's
mov eax,4 ;sys_write VU d\QR-
int 80h ;kernel system call IB7E}56l
# Vha7
mov ebx,0 ;return value Qz
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mov eax,1 ;sys_exit E\,-XH
int 80h ;kernel system call 1y4
^`>/.gL
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x86 CPU,Windows,MASM32 {!dVDf_
.386 !I
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.model flat,stdcall Y.r+wc]
option casemap:none h2""9aP!
;Include 文件定义 5[u]E~Fl}
include windows.inc ,WB{i^TD
include user32.inc (*)hD(C5
includelib user32.lib hfy_3} _
include kernel32.inc b%/ 1$>_
includelib kernel32.lib {jX2}
;数据段 Per1IcN
.data >J>[& zS
szCaption db 'A MessageBox!',0 %- 0t?/>
szText db 'Hello,world!',0 ;BIY^6,7e
;代码段 /RC7"QzL
.code w:Kl6"c
start: ]wG{!0pl
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK NPe%F+X
invoke ExitProcess,NULL 4Wm@W E
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Tyf`j,=
end start 7VF LJrt
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BEGIN { print "Hello, world!" } OH(waKq2I
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BASIC e;}7G
传统版BASIC(例如GWBASIC): q(2'\ _`u
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10 PRINT "Hello, world!" R[x_j
20 END 4Ic*9t3
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或在提示符输入: C&rkvM8
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?"Hello, world!":END EA]U50L(
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现代版BASIC(例如Quick BASIC): lv+TD!b
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Print "Hello, world!" (c
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以下的语句在Quick BASIC中同样有效: DX
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? "Hello,world!" (rm?jDm
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GET "LIBHDR" 8&`LYdzt
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LET START () BE pohp&Tcm
$( }oGA-Qc}B
WRITES ("Hello, world!*N") ~gZLY ls
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j yUCH*@
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Befunge AogVF
"!dlrow olleH">v .MoU1n{Yc
, ")XHak.JX
^_@ ~;{;,8!)
{go;C}
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Brainfuck Lhb35;\
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< "8jf81V*
+++++++++++++++.>.+++.------.--------.>+.>. U7}yi$WT
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#include <stdio.h>
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int main(void) dufu|BL|}
{ JL}_72gs
printf("Hello, world!\n"); dV$gB<iS
return 0; EC!02S
} 62o:,IcoG
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C++ 8ek@: Mw
#include <iostream> W^LY'ypT
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int main() :Cs4NF
{ f=gW]x7'R+
std::cout << "Hello, world!" << std::endl; .p]RKS=(:
return 0; k(7&N0V%zz
} lKp"xcAD
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C++/CLI Nk VK
int main() /,&<6c-Q@W
{ [<6^qla
System::Console::WriteLine("Hello, world!"); FX`>J6l:X
} KD7dye
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C# (C Sharp) wX5tp1 ?1J
class HelloWorldApp ipgC RHE
{ j8{i#;s!"
public static void Main() `WFw3TI
{ f:|1_ j
System.Console.WriteLine("Hello, world!"); J1RJ*mo7,
} J76kkW`5
} QIvVcfM^
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COBOL ju8q?Nyhs
IDENTIFICATION DIVISION. bj0G5dc=
PROGRAM-ID. HELLO-WORLD. A _
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ENVIRONMENT DIVISION. KNpl:g3{<Q
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DATA DIVISION. Ln<`E|[29
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PROCEDURE DIVISION. A) %/[GD2
DISPLAY "Hello, world!". e~[/i\
STOP RUN. L Mbn
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Common Lisp x_6[P2"PP
(format t "Hello world!~%") ?o4C;
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DOS批处理 wb5baY9
@echo off tip+q d
echo "Hello, world!" OSWYGnZg
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Eiffel [OV"}<V
class HELLO_WORLD mPN@{.(j
A gg<tM{yB
creation H*&f: