“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。 }Ptv[{q]GE
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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》。 SQU@JKi;g
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以下是用不同语言写成的Hello World程序的几个例子: ^jS1g*nrN
Ada u^^jt(j
with Ada.Text_Io; use Ada.Text_Io; `.pd %\
procedure Hello is nwfu@h0G
begin 0(u}z
Put_Line ("Hello, world!"); d
{ P$}b
end Hello; {0fQE@5@
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汇编语言 u-jc8W`Zd
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x86 CPU,DOS,TASM RZq_}-P,.c
MODEL SMALL $K\e
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IDEAL m*)jndXY
STACK 100H T 8]*bw
kt_O=
DATASEG !
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HW DB 'Hello, world!$' 1\/vS$bi(
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CODESEG >Q"3dw
MOV AX, @data wfu`(4
MOV DS, AX "B"ql-K
MOV DX, OFFSET HW g%^/^<ei
MOV AH, 09H NgsEEPu?
INT 21H lF46W
MOV AX, 4C00H [z7]@v6b
INT 21H z,dFDl$
END -R];tpddR5
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= 4|"<8'
x86 CPU,GNU/Linux,NASM
!P=L0A`
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 'ju_l)(R
;Enter this into "hello.asm" then type: H0lW gJmi|
;"nasm -f elf hello.asm"
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;"ld hello.o -o hello" b 5K"lPr
;"./hello" g~9rt_OV
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section .data ;data section declaration /']`}*d
msg db 'Hello World!',0AH &ns??:\+T
len equ $-msg ;string length 9X#]Lg?b
5BLBcw\;
section .text ;code section declaration ?l
@=}WN
global _start ;entry point (start of execution)
? uP5("c
_start: mov edx,len ;string length i~<.@&vt
mov ecx,msg ;string start &"Cy&[
mov ebx,1 ;file handle: stdout x2b
t^!t.
mov eax,4 ;sys_write Ag(JSVY
int 80h ;kernel system call \7$"i5
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mov ebx,0 ;return value qn{9vr
mov eax,1 ;sys_exit EUgKJ=jw
int 80h ;kernel system call Dcs O~mg
4 s9^%K\8{
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x86 CPU,Windows,MASM32 7NvRZ!
.386 |VyN>&r~6
.model flat,stdcall Aq'~'hS`1
option casemap:none kxA T
;Include 文件定义 tdu:imH~
include windows.inc A+\rGVNH'S
include user32.inc n1R{[\ >1
includelib user32.lib S&cN+r
include kernel32.inc (otD4VR_
includelib kernel32.lib T| (w-)mv
;数据段 y6G6wk;
.data O_
$ zK
szCaption db 'A MessageBox!',0 [z;}^ 3b
szText db 'Hello,world!',0 j#p3<V S4
;代码段 23bTCp.d
.code A~0yMww:$
start: 4QiV@#o:
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK ,CqGO %DY
invoke ExitProcess,NULL Lke!VS!P&
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 2*n~r
end start Ib/e\+H\
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AWK 3_i29ghv
BEGIN { print "Hello, world!" } +^rt48${ y
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BASIC n7n-uc
传统版BASIC(例如GWBASIC): Wn2J]BH
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10 PRINT "Hello, world!" dg0WH_#
20 END ,K&L/*
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或在提示符输入: Q;m8 drU
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?"Hello, world!":END &RHx8zScP
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现代版BASIC(例如Quick BASIC): zE}ry!{
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Print "Hello, world!" RO'b)J:j9
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以下的语句在Quick BASIC中同样有效: Ogh,
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? "Hello,world!" ^O"o-3dte
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BCPL mD?={*7%
GET "LIBHDR" V4,\vgGu
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LET START () BE oHu 7<r
$( [cfXcl
WRITES ("Hello, world!*N") ,x[~|J!
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Befunge /(}YjeS
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Brainfuck +' .o
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+++++++++++++++.>.+++.------.--------.>+.>. eQ=6< ^KZ
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C ]==S?_.B3n
#include <stdio.h> {'?PGk%v
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int main(void) *44E'Dxv
{ O%} hNTS"
printf("Hello, world!\n"); ]99;7
return 0; S'IQbHz*
} 'f7s*VKG
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C++ 5^2P\y(?
#include <iostream> H"pwIiC
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int main() S<w?,Z
{ T&E'MB
std::cout << "Hello, world!" << std::endl; &w^:nVgl
return 0; #<-%%
} *Oh]I|?
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C++/CLI AnBD~h h
int main() +3R/g@n
{ W)odaab7
System::Console::WriteLine("Hello, world!"); u&o<>d;)
} bI)%g
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C# (C Sharp) ,e*WJh8k[
class HelloWorldApp AIM<mU
{ 'W p~8}i@
public static void Main() mbIHzzW>
{ A] f^9F@
System.Console.WriteLine("Hello, world!"); %^;rYn3
} *adwCiB
} 9%?a\#C
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COBOL 2)|G%f_lS
IDENTIFICATION DIVISION. Okd7ua-f
PROGRAM-ID. HELLO-WORLD. !<0 `c
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ENVIRONMENT DIVISION. )JR&
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