“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。 E6@+w. VVO
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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》。 KDn`XCnk,
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以下是用不同语言写成的Hello World程序的几个例子: O#k?c }
Ada e7hPIG
with Ada.Text_Io; use Ada.Text_Io; <BO|.(ys
procedure Hello is 'fg`td
begin aC%0jJ<eo
Put_Line ("Hello, world!"); 2b3*zB*@V
end Hello; *nH ?o* #
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汇编语言 g[eI-J+F
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x86 CPU,DOS,TASM ZZeqOu7^
MODEL SMALL 6QxLHQA
IDEAL moc_}(
STACK 100H my04>6j0
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DATASEG n
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HW DB 'Hello, world!$' wefQmRK
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CODESEG !(o)*S
MOV AX, @data >\>HRyt%
MOV DS, AX yV`!Fq 1k
MOV DX, OFFSET HW DU[UGJg
MOV AH, 09H D|+H!f{k
INT 21H pf2$%lE
MOV AX, 4C00H 8, WQ}cC
INT 21H }Y-f+qX*
END wuh$=fya
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x86 CPU,GNU/Linux,NASM 31bKgU{
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). "@Te!.~A.
;Enter this into "hello.asm" then type: k_y@vW3
;"nasm -f elf hello.asm" {&2$1p/9'
;"ld hello.o -o hello" ETtK%%F0
;"./hello" ls/:/x(5d
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section .data ;data section declaration lSbAZ6
msg db 'Hello World!',0AH S:t7U%
len equ $-msg ;string length 0|NbU
jo"[$%0`
section .text ;code section declaration DE. Pw+5<.
global _start ;entry point (start of execution) vKI,|UD&-
_start: mov edx,len ;string length "+7~C6[s
mov ecx,msg ;string start i5)trSM|
mov ebx,1 ;file handle: stdout m=opY~&h
mov eax,4 ;sys_write %K/rPhU
int 80h ;kernel system call Bp4QHv9xqL
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mov ebx,0 ;return value 0"<gg5
mov eax,1 ;sys_exit n#x{~oQc
int 80h ;kernel system call o+q5:vJt
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x86 CPU,Windows,MASM32 Y$'fds4P
.386 sG^b_3o)A
.model flat,stdcall :v&GAs6H
option casemap:none lffw7T~
;Include 文件定义
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include windows.inc Omh(UHZBB
include user32.inc mX "z$
includelib user32.lib (6.0gB$aTu
include kernel32.inc (s"_NU j6
includelib kernel32.lib E8?Q>%_
;数据段 0gt/JI($
.data H:0-.a^ZS
szCaption db 'A MessageBox!',0 8LiRZ"
szText db 'Hello,world!',0 43 |zjE
;代码段 Oj<2_u
.code Ujw^j
start: ch< zpo:
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK ){gO b
invoke ExitProcess,NULL X1A;MA@0Ro
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end start yqB{QFXO
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BEGIN { print "Hello, world!" } /e\}
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BASIC 8U=M.FFp
传统版BASIC(例如GWBASIC): %P yU3
3 :f5xF
10 PRINT "Hello, world!" czedn_}%Q
20 END 5oORwOP
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或在提示符输入: (/FPGYu3h
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?"Hello, world!":END a{]1H4+bQ
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现代版BASIC(例如Quick BASIC): Iy e
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Print "Hello, world!" ?VReKv1\
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以下的语句在Quick BASIC中同样有效: }3N8EmS
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? "Hello,world!" 7p2x}[ .\
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BCPL c) 1m4SB@
GET "LIBHDR" ! 4i
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LET START () BE sRY: 7>eg
$( @ZT25CD
WRITES ("Hello, world!*N") +mAMCM2N
$) T@k&YJ
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Befunge M@csB. '
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Brainfuck ]c$%;!ZE
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+++++++++++++++.>.+++.------.--------.>+.>. x\t>|DB
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#include <stdio.h> t F`>.=
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int main(void) }V9146
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printf("Hello, world!\n"); Gb~q:&IUr
return 0;
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} I,?bZ&@8
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C++ :B"'49Q`
#include <iostream> Cr(pN[,
cL=P((<K?
int main() RV&2y=eb
{ Gt- -7S
std::cout << "Hello, world!" << std::endl; J"[OH,/_
return 0; Jbs:}]2
} =XoNk1
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C++/CLI +R*4`F:QJQ
int main() j*+r`CX
{ r$0=b
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System::Console::WriteLine("Hello, world!"); TTqOAo[-Z
} E\'_`L
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C# (C Sharp) %/UQ0d~b
class HelloWorldApp Q~*A`h#
{ #0 ^QUOp
public static void Main() 3V,X=
{ c#G(7. 0MU
System.Console.WriteLine("Hello, world!"); TF3Tha]
} 5^%^8o
} rj{'X /
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COBOL 4.VEE~sH$
IDENTIFICATION DIVISION. b?bIxCA8
PROGRAM-ID. HELLO-WORLD. zpa'G1v
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ENVIRONMENT DIVISION. 8zpK;+
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DATA DIVISION. T!;<Fy"p
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PROCEDURE DIVISION. ;=e A2
DISPLAY "Hello, world!". j*6!7u.,K
STOP RUN. R6M@pO
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Common Lisp [s7I.rdGzz
(format t "Hello world!~%") 4wNxn
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