“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。 \gzwsT2&
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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》。 L9YwOSb.
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以下是用不同语言写成的Hello World程序的几个例子: #M9D"
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Ada Q]g 4gj
with Ada.Text_Io; use Ada.Text_Io; T[[
procedure Hello is NUnc"@
begin |%cO"d^ri
Put_Line ("Hello, world!"); MJ/%$
end Hello;
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汇编语言 |{LaZXU &
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x86 CPU,DOS,TASM 9-iB?a7{.
MODEL SMALL m^x\@!N:(
IDEAL 42LXL*-4
STACK 100H iai4$Y(%
hSKH#NS
DATASEG l}-`E@w
HW DB 'Hello, world!$' ec[[OIO
8EEQV} 4
CODESEG 59Q Q_#>
MOV AX, @data n_&)VF#n(
MOV DS, AX 1@z@
MOV DX, OFFSET HW ow$l!8
MOV AH, 09H 2Yd~v|
INT 21H O*/-I
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MOV AX, 4C00H GJt9hDM$0
INT 21H 3N*C]
END NE%yv,B
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x86 CPU,GNU/Linux,NASM GhQ`{iJM
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). .'mC3E+$
;Enter this into "hello.asm" then type: F20-!b
;"nasm -f elf hello.asm" .-~%w
;"ld hello.o -o hello" $#JVI:
;"./hello" *]{I\rX
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section .data ;data section declaration skx=w<YO6]
msg db 'Hello World!',0AH 1nTaKK
q
len equ $-msg ;string length p}|wO&4h
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section .text ;code section declaration la|l9N^,
global _start ;entry point (start of execution) ?[/,*Q%
_start: mov edx,len ;string length ];~[Olc
mov ecx,msg ;string start (0m$W<
mov ebx,1 ;file handle: stdout 2LH;d`H[0
mov eax,4 ;sys_write e.ym7L]$O
int 80h ;kernel system call UuC"-$:
SA n=9MG
mov ebx,0 ;return value zp-~'kIJ
mov eax,1 ;sys_exit U105u.#7
int 80h ;kernel system call u,SZ-2K!7~
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sl
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x86 CPU,Windows,MASM32 5f@YrTO[@
.386 Yn2^nT=8
.model flat,stdcall +Qb/:xQu
option casemap:none *xTquV$
;Include 文件定义 JU1; /3(
include windows.inc #&c;RPac!6
include user32.inc ZLX`[
includelib user32.lib Ns8NaD
include kernel32.inc WzbN=&
C]h
includelib kernel32.lib VD`2lGdF
;数据段 p)&\>
.data l"y9XO|
szCaption db 'A MessageBox!',0 =d.W'q|
szText db 'Hello,world!',0 `3P62M<
;代码段 K5rj!*x.o
.code \1'R}B@;
start: I>~BkR+u%o
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 7:E#c"S
q
invoke ExitProcess,NULL 6Q.whV%y
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >,vW
end start ?'m5)Z{
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BEGIN { print "Hello, world!" } FGhrf
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BASIC 5<?$/H|7T
传统版BASIC(例如GWBASIC): b=\3N3OX
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10 PRINT "Hello, world!" NfN6KDd]2L
20 END i j;'4GzQL
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或在提示符输入: \1D,Kx;Cb
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?"Hello, world!":END h,?Yw+#o"
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现代版BASIC(例如Quick BASIC): sn`?Foh
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Print "Hello, world!" *]?YvY
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以下的语句在Quick BASIC中同样有效: >(KUYX?p
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? "Hello,world!" )?y"NVc*
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BCPL &scD)
GET "LIBHDR" BTtYlpN6
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LET START () BE &Sp:?I-
$( RW8u0 ?b
WRITES ("Hello, world!*N") <{Wa[1D
$) 8k'em/M~
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Befunge yN%Pe:R
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, :u93yH6~8
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9 NSYrIQ"
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Brainfuck \9Zfu4WR
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< 7O :Gi*MA
+++++++++++++++.>.+++.------.--------.>+.>. A1T;9`E
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C [T|1 Qq7
#include <stdio.h> B%;+8]
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int main(void) I65GUX#DV
{ f\w4F'^tj
printf("Hello, world!\n"); -bQvJ`iF
return 0; H}rP{`m
} 'Q,<_L"
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C++ `&JA7UD>
#include <iostream> Py<vN!
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int main() x9s`H)
{ 13
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std::cout << "Hello, world!" << std::endl; ]2
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return 0; =J\7(0Dz4t
} Mt0|`=64
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C++/CLI zaPR>:r0
int main() CcETS}Q0C
{ Pfy;/}u^c
System::Console::WriteLine("Hello, world!"); <!$Cvx\U
} wt,N<L
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C# (C Sharp) K?WqAVK
class HelloWorldApp ).b+S>k
{ ZH:X4!
public static void Main() :g_ +{4
{ d^>s e'ya
System.Console.WriteLine("Hello, world!"); roQIP%h!
} a)b@en;v
}
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COBOL =B2=UF
IDENTIFICATION DIVISION. vS<e/e+
PROGRAM-ID. HELLO-WORLD. 2YQ$hL ~
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ENVIRONMENT DIVISION. H&+s&