“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。 Z?=o(hkd
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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》。 bfncO[Q,?
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以下是用不同语言写成的Hello World程序的几个例子: oxeu%wj_
Ada Hik=(pTu>
with Ada.Text_Io; use Ada.Text_Io; CP2wg .
procedure Hello is 2SlL`hN>Z
begin 6QT&{|q=
Put_Line ("Hello, world!"); `p* 43nV
end Hello; XY? Cl
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u tkdL4G}'
汇编语言
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x86 CPU,DOS,TASM
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MODEL SMALL | Z7j
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IDEAL x;bA\b
STACK 100H T!9AEG
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DATASEG tw
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HW DB 'Hello, world!$' rf@47H
S~fP$L5
CODESEG 8pr toCB
MOV AX, @data (*6 .-Xn
MOV DS, AX
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MOV DX, OFFSET HW wM7Iu86
MOV AH, 09H i
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INT 21H p&<n_b
MOV AX, 4C00H a;IOL
INT 21H Y7qQ`|
END "bRjY?D
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x86 CPU,GNU/Linux,NASM *}#HBZe(9
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ,38M6yD
;Enter this into "hello.asm" then type: EJ<L,QH3
;"nasm -f elf hello.asm" {2T u_2>
;"ld hello.o -o hello" @f|~$$k=
;"./hello" LfW:G5@-
OMo /a%`
section .data ;data section declaration NCzabl
msg db 'Hello World!',0AH G~u$BV'
len equ $-msg ;string length toD!RE
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section .text ;code section declaration >+;}"J
global _start ;entry point (start of execution) c'VCCXe
_start: mov edx,len ;string length %rlqq*
mov ecx,msg ;string start V,c^Vqy
mov ebx,1 ;file handle: stdout ,+h<qBsV@
mov eax,4 ;sys_write `.pd %\
int 80h ;kernel system call p-(V2SP/)t
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mov ebx,0 ;return value daSx^/$R
mov eax,1 ;sys_exit e&ZH 1^O
int 80h ;kernel system call 7 u Q +]d
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x86 CPU,Windows,MASM32 QALr
.386 y,jpd#Y
.model flat,stdcall !
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option casemap:none Si23w'T
;Include 文件定义 wfu`(4
include windows.inc GeB-4img
include user32.inc Q
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includelib user32.lib qJl DQc-
include kernel32.inc ZRwN #?x
includelib kernel32.lib = 4|"<8'
;数据段 o,J8n;"l
.data wpQp1){%Q
szCaption db 'A MessageBox!',0 @J^
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szText db 'Hello,world!',0 %Y#W#G
;代码段 fU%Mz\t
.code >OjK0jiPf
start: n^qwE
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK \>.[QQVI"l
invoke ExitProcess,NULL @'hkU$N)
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> E/1:4?1 S
end start } 21!b :a
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BEGIN { print "Hello, world!" } `@6y Wb:X
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BASIC q/@r#
传统版BASIC(例如GWBASIC): 37tJ6R6[
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10 PRINT "Hello, world!" w'xPKO$bzR
20 END W5Jb5
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或在提示符输入: lPA}06hU
fp 3`O9+em
?"Hello, world!":END w#L`|cYCm
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现代版BASIC(例如Quick BASIC): k#V\O2lb
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Print "Hello, world!" }^n"t>Z8
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以下的语句在Quick BASIC中同样有效: =gd~rk9
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? "Hello,world!" Vm I
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BCPL mv/Nz?
GET "LIBHDR" 3|URlz
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LET START () BE Y31e1
$( >oAXS\Ts
WRITES ("Hello, world!*N") Q+U" %
$) SU~ljAF4
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Befunge v//Drj
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#include <stdio.h> PvxU.
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int main(void) pWoeF=+y]W
{ +' .o
printf("Hello, world!\n"); GgvMd~
return 0; OZ<fQf.Gh}
} iVM% ]\
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C++ [F,s=,S'M
#include <iostream> S'IQbHz*
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int main() VY!A]S"
{ _Vt
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std::cout << "Hello, world!" << std::endl; ^/$U(4
return 0; \LM{.gzT
} S<w?,Z
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