“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。 7 W{~f?Sh
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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》。 *0~M
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以下是用不同语言写成的Hello World程序的几个例子: H UkerV
Ada -E]Sk&4Gj
with Ada.Text_Io; use Ada.Text_Io; lBmm(<~Z
procedure Hello is U. (Tl>K|0
begin $3 4j6;oN
Put_Line ("Hello, world!"); 5U~OP
end Hello; HlPG3LD!
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汇编语言 ]\BUoQ7I/
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x86 CPU,DOS,TASM 69/?7r
MODEL SMALL \vVSh
IDEAL t:=k)B
STACK 100H rrcwtLNbu
{i>Jfl]G}
DATASEG sP y2/7Wqd
HW DB 'Hello, world!$' xs%LRF#u
b=1%pX_
CODESEG O3Uh+gKQ
MOV AX, @data 1ef'7a7e8
MOV DS, AX UiIF6-ZZ!
MOV DX, OFFSET HW _f3
WRyN0
MOV AH, 09H (Y2mmd
INT 21H _q)!B,y-/N
MOV AX, 4C00H k2p'G')H
INT 21H (a }J$:
END {zP#woz2Q
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x86 CPU,GNU/Linux,NASM DbtF~`3, .
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 5V @&o`!=h
;Enter this into "hello.asm" then type: KDD@%E
;"nasm -f elf hello.asm" @rwU 1T33
;"ld hello.o -o hello" xGRT"U(
;"./hello" W2eAhz&
~@Kf2dHes
section .data ;data section declaration FJT1i@N
msg db 'Hello World!',0AH _]=9#Fg7{
len equ $-msg ;string length CZ3].DA|z
2xn<E>]
section .text ;code section declaration Pz@/|&]
global _start ;entry point (start of execution) `(DJs-xD
_start: mov edx,len ;string length MCU9O
mov ecx,msg ;string start [N:BM% FQ
mov ebx,1 ;file handle: stdout ^PqMi:htc
mov eax,4 ;sys_write iCrxV{
int 80h ;kernel system call #*2Rp8n
~;unpym'
mov ebx,0 ;return value 62kb2C
mov eax,1 ;sys_exit `G?qY8
int 80h ;kernel system call q (>c`5
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qS.)UaA
x86 CPU,Windows,MASM32 Tn A?u (R%
.386 <'&F;5F3V
.model flat,stdcall hS:jBp,
option casemap:none +.@c{5J<
;Include 文件定义 }+0z,s~0.
include windows.inc #s2B%X
include user32.inc .N"~zOV<#
includelib user32.lib %>y;zqZIU
include kernel32.inc QaQ'OrP
includelib kernel32.lib (Z-l/)Q
;数据段 '7tBvVO_
.data Y)M8zi>b
szCaption db 'A MessageBox!',0 T'1gy}
szText db 'Hello,world!',0 `FJ|W6%
;代码段 {Q~7M$
.code Hm9<