“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。 prlnK
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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》。 doFp53NhV
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以下是用不同语言写成的Hello World程序的几个例子: s2@N&7"u)
Ada w(J-[t118
with Ada.Text_Io; use Ada.Text_Io; @!Il!+^3
procedure Hello is teUCK(;23
begin Ar'}#6
Put_Line ("Hello, world!"); BgA\l+
end Hello; }[!;c+ke
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汇编语言 *-ZD -B*?
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x86 CPU,DOS,TASM >RHK6c
MODEL SMALL e[ i&2mM
IDEAL
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STACK 100H $sU?VA'h
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DATASEG !}"npUgE
HW DB 'Hello, world!$' ]b'K
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CODESEG 7_S+/2}U*
MOV AX, @data 5BS-q"
MOV DS, AX <.l5>mgkCw
MOV DX, OFFSET HW N ]}Re$5
MOV AH, 09H eoR@5OA&
INT 21H C]WVH\Pp
MOV AX, 4C00H (*/P~$xIj
INT 21H s$C;31k
END 9$~D4T
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x86 CPU,GNU/Linux,NASM g"2@E
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). @IB8(TZ5I
;Enter this into "hello.asm" then type: E5jK}1t4V
;"nasm -f elf hello.asm" /Or76kE
;"ld hello.o -o hello" y@~.b^?_u
;"./hello" Fy`VQ\%7t
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section .data ;data section declaration ;)83tx
/
msg db 'Hello World!',0AH UldK lQ8
len equ $-msg ;string length Kw(/#C:$
S? r:=GS
section .text ;code section declaration plsf` a
global _start ;entry point (start of execution) l2gI2Cioa
_start: mov edx,len ;string length L^RyJ;^c
mov ecx,msg ;string start `*KS`
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mov ebx,1 ;file handle: stdout >6:slNM#
mov eax,4 ;sys_write bLCr h(<
int 80h ;kernel system call &VR<'^>
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mov ebx,0 ;return value +O j28vR
mov eax,1 ;sys_exit xO/44D
int 80h ;kernel system call 5iG|C ~
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x86 CPU,Windows,MASM32 ;r49H<z
.386 d;D^<-[i
.model flat,stdcall q1r\60M
option casemap:none tK g%5;v
;Include 文件定义 xW/JItF
include windows.inc Bpo~x2p
include user32.inc {
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includelib user32.lib ^nkwT~Bya
include kernel32.inc 66:|)
includelib kernel32.lib r\@"({q}_-
;数据段 /W:}p(>4a
.data PM9HfQU?
szCaption db 'A MessageBox!',0 )lB-D;3[_
szText db 'Hello,world!',0 zLOmtZ(['
;代码段 ,m3AVHa*G
.code 5w}xjOYIjV
start: -
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invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK WVy"MD
invoke ExitProcess,NULL P/nXY
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Sl:\5]'yJ
end start "
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BEGIN { print "Hello, world!" } YX^{lD1Jj
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传统版BASIC(例如GWBASIC): .IF dJ
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10 PRINT "Hello, world!" 5:iril
20 END (ter+rTv
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或在提示符输入: YV!!bI
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?"Hello, world!":END #n2GW^x
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现代版BASIC(例如Quick BASIC): rQKBT]?y
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Print "Hello, world!" iW*0V3
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以下的语句在Quick BASIC中同样有效: 9
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? "Hello,world!" IEC:zmkn
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GET "LIBHDR" JN|<R%hy
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LET START () BE `f6Qd2\
$( dE^(KBF
WRITES ("Hello, world!*N") S1$\D!|1
$) <9@VY
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Befunge Ls|;gewp
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C :Bn\1\
#include <stdio.h> 2{U4wTu
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int main(void) ZQ~?
{ $1Xg[>1g5
printf("Hello, world!\n"); b[*di{?-
return 0; veK
} d^lA52X6P
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