“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$OF|ZZQ
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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》。 {Y3_I\H8{
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以下是用不同语言写成的Hello World程序的几个例子: Pe+ 8~0o=R
Ada b'Fx),
with Ada.Text_Io; use Ada.Text_Io; *j_fG$10g
procedure Hello is [a>JG8[,t
begin j61BP8E
Put_Line ("Hello, world!"); ,6EZb[;g^
end Hello; 0j
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汇编语言 Ie^Dn!0S
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x86 CPU,DOS,TASM 4! Oa4
MODEL SMALL |
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IDEAL zbIwH6
STACK 100H (PsSE:r}+
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DATASEG lJ2|jFY9
HW DB 'Hello, world!$' u/!mN2{Rd
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CODESEG [5RFQ!
MOV AX, @data g9([3pV,
MOV DS, AX UALg!M#
MOV DX, OFFSET HW A1k&`
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MOV AH, 09H AjL?Qh4
INT 21H 7'{Yz
MOV AX, 4C00H -_{C+Y_
INT 21H j^aQ>(t(9
END GqIvvnw@f
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x86 CPU,GNU/Linux,NASM +QXYU8bYZ
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). w}U5dM`
;Enter this into "hello.asm" then type: +%Bf
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;"nasm -f elf hello.asm" S0Bl?XsD_
;"ld hello.o -o hello" G3_mWppH
;"./hello" p+`*~6Jj/
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section .data ;data section declaration /SqFP
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msg db 'Hello World!',0AH N}l]Ilm$34
len equ $-msg ;string length "f&i 251
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section .text ;code section declaration 9A}
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global _start ;entry point (start of execution) RZV1:hNN
_start: mov edx,len ;string length <SC|A|
mov ecx,msg ;string start
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mov ebx,1 ;file handle: stdout LG&Q>pt.
mov eax,4 ;sys_write hyvV%z Z
int 80h ;kernel system call G8(i).Q
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mov ebx,0 ;return value .z-^Ga*
mov eax,1 ;sys_exit VI|DMx
int 80h ;kernel system call qs
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x86 CPU,Windows,MASM32 9Pob|UA
.386 ^d5./M8Bd
.model flat,stdcall [>J~M!yu:r
option casemap:none eVCkPv*
;Include 文件定义 -{:LxE
include windows.inc =iK6/ y`
include user32.inc t!=~5YgKs
includelib user32.lib <C.$Db&9
include kernel32.inc qiKtR
includelib kernel32.lib fkv{\zN
;数据段 ,?~UpsUx
.data q=0{E0@9({
szCaption db 'A MessageBox!',0 lRATrp#T
szText db 'Hello,world!',0 tCCi|*P
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;代码段 KGE-RK
.code Q0"F> %Cn
start: zju,#%
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK a9EI7pnq
invoke ExitProcess,NULL seV;f^-hR
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> )|^<woli,
end start zm3MOH^a
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AWK Hv7D+j8M
BEGIN { print "Hello, world!" } R
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vb ^!(
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BASIC |XdrO
传统版BASIC(例如GWBASIC): [U7,\o4w
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10 PRINT "Hello, world!" -MW(={#
20 END F-7b`cF9[r
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或在提示符输入: HYYx*CJ)
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?"Hello, world!":END s1vYZ
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现代版BASIC(例如Quick BASIC): *2C79hi1
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Print "Hello, world!" Yl~?MOk
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以下的语句在Quick BASIC中同样有效: 2gR_1*|
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? "Hello,world!" G@<lwnvD*J
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GET "LIBHDR" / z?7ic0
Csm!\I
LET START () BE x|i3e&D
$( :w_1J'D}
WRITES ("Hello, world!*N") X*yp=qI
$) }'0Xz9/ l
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Befunge 8]MzOGB8
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Brainfuck GJ_)Cl+5E
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< D#[ :NXahn
+++++++++++++++.>.+++.------.--------.>+.>. vFC=qLz:
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C B(Q.a&w45t
#include <stdio.h> \.|A,G=
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int main(void) 2.2a2.I1
{ JJ=is}S|
printf("Hello, world!\n"); d;:&3r|X
return 0; D %
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} U`_vF~el~
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C++ +p<R'/
#include <iostream> 5(`GF|
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int main() q$'&R