“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。 MhEw
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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》。 XE3aXK'R
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以下是用不同语言写成的Hello World程序的几个例子: P,pnga3Wu
Ada 8OhDjWVJ
with Ada.Text_Io; use Ada.Text_Io; 7k%T<;V
procedure Hello is 5ABhj* 7
begin [dX`K`k
Put_Line ("Hello, world!"); 8iQ[9
end Hello; b;mSQ4+
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汇编语言 G* b2,9&F
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x86 CPU,DOS,TASM \,UZX&ip
MODEL SMALL ;;s* Ohh
IDEAL ,8G{]X)
STACK 100H 9W`Frx'h1
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DATASEG !<@J6??a}s
HW DB 'Hello, world!$' ^nK7i[yF.k
gYop--\14]
CODESEG ]uL+&(cr
MOV AX, @data Y$8JM
MOV DS, AX t%1 ^Li
MOV DX, OFFSET HW q>:$c0JY
MOV AH, 09H ~}ml*<z@
INT 21H pI[ZBoR~
MOV AX, 4C00H ov#7hxe
INT 21H O%!5<8Xrb
END `BFIC7a
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x86 CPU,GNU/Linux,NASM SF]@|
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). -ZOBAG*
;Enter this into "hello.asm" then type: vC;]jJb:
;"nasm -f elf hello.asm" +A_J1iJ<
;"ld hello.o -o hello" oT95^y\9
;"./hello" E N^Uki`
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section .data ;data section declaration L];y}]:F*
msg db 'Hello World!',0AH 'WyTI^K9
len equ $-msg ;string length 6$ Q,Y}j
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section .text ;code section declaration ({}( qm
global _start ;entry point (start of execution) vdoZ&Tu
_start: mov edx,len ;string length @MR?6 n*k
mov ecx,msg ;string start !hxIlVd{
mov ebx,1 ;file handle: stdout v{x{=M]
mov eax,4 ;sys_write -]G(ms;}/Y
int 80h ;kernel system call (LAXM
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mov ebx,0 ;return value `:{B(+6
mov eax,1 ;sys_exit p^m5`{1]x
int 80h ;kernel system call 0Sl]!PZR1
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x86 CPU,Windows,MASM32 =;~I_)Pg1
.386 M<?Q4a'Q
.model flat,stdcall 2h30\/xkU
option casemap:none }_.:+H!@
;Include 文件定义 vW,snxK6y&
include windows.inc q(^Q3
include user32.inc |w}w.%
includelib user32.lib 6`01EIk
include kernel32.inc hm$X]H`uMX
includelib kernel32.lib
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;数据段 pe0x""K
.data Ft{[ae?4
szCaption db 'A MessageBox!',0 Si}HX!s
szText db 'Hello,world!',0 G)=HB7u[a
;代码段 I{0k
.code n;XWMY
start: I~eSZ?$s#
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK Z-=YM P ]Q
invoke ExitProcess,NULL <S"~vKD'
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end start ["<nq`~
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BEGIN { print "Hello, world!" } "HMP$)d
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BASIC lw%?z/HDf
传统版BASIC(例如GWBASIC): 8am`6;O:!
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IO
10 PRINT "Hello, world!" ^u)z{.z'H/
20 END qf'm=efRyu
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或在提示符输入: #PLEPB
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?"Hello, world!":END j{VGClb=T
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现代版BASIC(例如Quick BASIC): 7;`o(
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Print "Hello, world!" ;_kzcK!l
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以下的语句在Quick BASIC中同样有效: _=6 rE
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