“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。 T <ET
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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》。 \ Et3|Iv
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以下是用不同语言写成的Hello World程序的几个例子:
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Ada SmSH2m-
with Ada.Text_Io; use Ada.Text_Io; U/l&tmIVY
procedure Hello is 'Xq|Kf (
begin X=fYWj[H,
Put_Line ("Hello, world!"); EE'io5\et
end Hello; +Kbjzh3<wG
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汇编语言 y''z5['
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x86 CPU,DOS,TASM 0*D$R`$
MODEL SMALL %.-4!vj
IDEAL \$T(t/$9
STACK 100H T&u5ki4NE
* kDC liL
DATASEG 2?ez,*-[
HW DB 'Hello, world!$' GqaCj^2f
c?[I?ytl
CODESEG Jgd'1'FOs
MOV AX, @data dV$gB<iS
MOV DS, AX 9} M?P
MOV DX, OFFSET HW 9u}Hmb
MOV AH, 09H 8ek@: Mw
INT 21H kr:^tbJ
MOV AX, 4C00H BdblLUGK#
INT 21H Y}|X|!0x
END 9FYUo
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x86 CPU,GNU/Linux,NASM !_D0vI;
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). gANuBWh8T
;Enter this into "hello.asm" then type: O6a<`]F
;"nasm -f elf hello.asm" P& -Qc
;"ld hello.o -o hello" {xB!EQ"
;"./hello" f:|1_ j
/dQl)tL
section .data ;data section declaration # 0Q]dO
msg db 'Hello World!',0AH YPK(be_|I
len equ $-msg ;string length bj0G5dc=
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section .text ;code section declaration ]kRfB:4ED
global _start ;entry point (start of execution) lN?qp'%H`
_start: mov edx,len ;string length |[ k.ii6iO
mov ecx,msg ;string start ~>Fu5i $i
mov ebx,1 ;file handle: stdout L Mbn
mov eax,4 ;sys_write vkd.)x`J,
int 80h ;kernel system call 0gy/:T
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mov ebx,0 ;return value LW'D?p#
mov eax,1 ;sys_exit FR4QUk
int 80h ;kernel system call pW@Pt 3u
wb5baY9
tip+q d
x86 CPU,Windows,MASM32 OSWYGnZg
.386 R_ ,U Mt
.model flat,stdcall 2U\u4NO{
option casemap:none foF({4q7b^
;Include 文件定义 I{9QeRI
include windows.inc ZQoU3AD;
include user32.inc AJ?r,!)
includelib user32.lib 6YLj^w] %
include kernel32.inc )72+\C[*~r
includelib kernel32.lib YY((V@|K
;数据段 nE&