“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。 ;!7M<T$&
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将Hello World程序作为第一个学写的程序,现在已经成为一种传统。该程序最早出现在由Brian Kernighan和Dennis Ritchie写的计算机程序设计教程《C语言程序设计》。 2T@?&N^OD
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以下是用不同语言写成的Hello World程序的几个例子: @ Jb-[W$*
Ada Uc
; S@
with Ada.Text_Io; use Ada.Text_Io; g706*o)h
procedure Hello is l<(jm{q?u
begin <(xro/
Put_Line ("Hello, world!"); 'F:Tv[qx
end Hello; gNkBHwv
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3Tc90p l*t
汇编语言 FBOgaI83G
x2/ciC
x86 CPU,DOS,TASM /^gu&xnS
MODEL SMALL /)dyAX(
IDEAL "`4M4`'
STACK 100H e5"5 U7
H|MAbx
7
DATASEG [A]
+Azc
HW DB 'Hello, world!$' t1$pl6&,
I*g[Y=
CODESEG /YvwQ
MOV AX, @data jfam/LL{V
MOV DS, AX +CXq41g"c
MOV DX, OFFSET HW {d)L0KXK
MOV AH, 09H hvA|d=R(
INT 21H m%.[|sZ3EM
MOV AX, 4C00H gO@LJ
INT 21H uu>R)iTQ%S
END Zw<<p|{)<
?+%bEZ`
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x86 CPU,GNU/Linux,NASM V?jWp$
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). [o7Qr?RN
;Enter this into "hello.asm" then type: =+[`9
;"nasm -f elf hello.asm" F[)tg#}@G
;"ld hello.o -o hello" g&8-X?^Q
;"./hello" tbfwgK
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section .data ;data section declaration t\v~ A0
msg db 'Hello World!',0AH *<h )q)HS
len equ $-msg ;string length ~~m(CJ4S
=8"xQ>D62
section .text ;code section declaration r029E-
global _start ;entry point (start of execution) ZqjLZ9?q
_start: mov edx,len ;string length ()n2 KT
mov ecx,msg ;string start m,}GP^<1i
mov ebx,1 ;file handle: stdout U]9k,#
mov eax,4 ;sys_write WZP1g kX&M
int 80h ;kernel system call b?,=|H
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mov ebx,0 ;return value ~8-xj6^
mov eax,1 ;sys_exit $'::51
int 80h ;kernel system call 4AF.KX7
`joyHKZI.
Wdga(8t
x86 CPU,Windows,MASM32 b d C
.386 8,e%=7h_e
.model flat,stdcall e+<9Sh7&
option casemap:none 5ci1ce
;Include 文件定义 T{=&>pNK[
include windows.inc @%fL*^yr;C
include user32.inc 6*
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includelib user32.lib >Nx4 +|
include kernel32.inc "3_GFq
includelib kernel32.lib k[f_7lJ2
;数据段 dx$+,R~y
.data O]j<