“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。 &"H<+>`
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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》。 -Y jv&5
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以下是用不同语言写成的Hello World程序的几个例子: 8)q]^
Ada yZ(Nv $[5
with Ada.Text_Io; use Ada.Text_Io; yK>0[6l
procedure Hello is q:~`7I
begin 3Ld ;zW
Put_Line ("Hello, world!"); +{Vwz
end Hello; sKB-7
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汇编语言 s>M~g,xTU
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x86 CPU,DOS,TASM -RqAT 1
MODEL SMALL nGJIjo_I
IDEAL O3w_vm'
STACK 100H ZTPOD.:#
M-qxD"VtV=
DATASEG :'=~/GR
HW DB 'Hello, world!$' Dxa)7dA|
T.m)c%]^/
CODESEG A2O_pbQti
MOV AX, @data "TH-A6v1
MOV DS, AX j@?[vi
MOV DX, OFFSET HW M;TfD
MOV AH, 09H divZJc
INT 21H #u2&8-Gh
MOV AX, 4C00H .jGsO0
INT 21H * /Ry6Yu
END
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x86 CPU,GNU/Linux,NASM hC 4X Y
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). }$k`[ivBx(
;Enter this into "hello.asm" then type: eze(>0\f
;"nasm -f elf hello.asm" fe9& V2Uu
;"ld hello.o -o hello" t1{%FJ0F
;"./hello" Qpv}N*v^
f$S
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section .data ;data section declaration W!4V:(T
msg db 'Hello World!',0AH W.6JnYLQ&
len equ $-msg ;string length >~wk
n.qxxzEN
section .text ;code section declaration
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global _start ;entry point (start of execution) ;R|#ae@
_start: mov edx,len ;string length Nj@?}`C 4
mov ecx,msg ;string start $8T|r+<
mov ebx,1 ;file handle: stdout r dG2| Tp
mov eax,4 ;sys_write 1q233QSW)
int 80h ;kernel system call =&*QT&e
qL;T&h
mov ebx,0 ;return value QB|fFj58u
mov eax,1 ;sys_exit .lF\b A|
int 80h ;kernel system call =wR]X*Pan
46?F+,Rzl
U#]eN[
x86 CPU,Windows,MASM32 Py25k 0j!
.386 c'Tu,-
.model flat,stdcall SnF[mN'
option casemap:none w3bH|VnU8;
;Include 文件定义 a4CNPf<$
include windows.inc 8W<)c
include user32.inc &'ETx"
includelib user32.lib QKaj4?p$|S
include kernel32.inc ut5!2t$c
includelib kernel32.lib 2"Uk}Yz|
;数据段 v0MOX>`s
.data %FI6\|`M
szCaption db 'A MessageBox!',0 ?nSp?m;
szText db 'Hello,world!',0
6p6Tse]
;代码段 @)'@LF1Z
.code F)iGD~
start:
nIDsCu=A
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK _NqT8C4C
invoke ExitProcess,NULL *_K-T#
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> GuY5 %wr
end start <w2NJ~M^
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