“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。 +
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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》。 <HYK9{Q
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以下是用不同语言写成的Hello World程序的几个例子: {?X#E12vf
Ada ~HW8mly'
with Ada.Text_Io; use Ada.Text_Io; K;uOtbdOK
procedure Hello is R0yPmh,{
begin cXcrb4IKD
Put_Line ("Hello, world!"); pTzwyj!SD
end Hello; +=_^4
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汇编语言 .>X0 $#
@^q|C&j
x86 CPU,DOS,TASM ;i;2cq
MODEL SMALL ucP"<,a
IDEAL <H; z4
STACK 100H mBAI";L3
aL)}S%5o?
DATASEG [nSlkl
HW DB 'Hello, world!$' Kivr)cIG
%#AM }MWIa
CODESEG Ai*R%#
MOV AX, @data ^4G%*-
MOV DS, AX G`;YB
MOV DX, OFFSET HW Pn?,56SD=
MOV AH, 09H kdq<)>"
INT 21H cA,`!dG2,
MOV AX, 4C00H +ConK>;
INT 21H &XvSAw+D@
END @%FLT6MY
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x86 CPU,GNU/Linux,NASM OV~]-5gau
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). tVUC@M>'
;Enter this into "hello.asm" then type: g$^:2MT"aQ
;"nasm -f elf hello.asm" 6H]rO3[8
;"ld hello.o -o hello" lwVo%-
;"./hello" E%.w6-
,ORwMZtw{H
section .data ;data section declaration J2_~iC&;s
msg db 'Hello World!',0AH B,xohT
len equ $-msg ;string length \Fh#CI
bmid;X|
section .text ;code section declaration fen~k#|l
global _start ;entry point (start of execution) AhyV
_start: mov edx,len ;string length UnE[FYx
mov ecx,msg ;string start |>'.(
mov ebx,1 ;file handle: stdout 13JZ\`ceb
mov eax,4 ;sys_write *ku}.n
int 80h ;kernel system call _L^(CFE
8*bEsc|
mov ebx,0 ;return value x$SxGc~4gb
mov eax,1 ;sys_exit <<SUIY@X
int 80h ;kernel system call vC
[uEx:
S6d&w6
qOqU
CRUe:
x86 CPU,Windows,MASM32 Xn%ty@8
.386 H{d;,KfX
.model flat,stdcall vvi[+$M
option casemap:none 7]8nW!h;
;Include 文件定义 Y3 V9
include windows.inc ZFxa2J~ ;
include user32.inc 7{BTtUMAC
includelib user32.lib &^7^7:Y=?
include kernel32.inc Yk^clCB{A(
includelib kernel32.lib j@o
\d%.'!
;数据段 lSG"c+iV
.data \jpm
szCaption db 'A MessageBox!',0 _\ &