“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。 zeTszT)
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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》。 1 !s28C5u
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以下是用不同语言写成的Hello World程序的几个例子: >}F? <JB
Ada HtzMDGV<
with Ada.Text_Io; use Ada.Text_Io; #K`B<2+T
procedure Hello is )Z:m)k>r;
begin {aJz. `u\
Put_Line ("Hello, world!"); $j
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end Hello; bhKV +oN
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;Prg'R[o;
汇编语言 ZW* fOaj
v>^jy8$
x86 CPU,DOS,TASM l%bq2,-%
MODEL SMALL >q &L/N5
IDEAL v@,XinB[
STACK 100H J3\)Jy
4sd-zl$Of
DATASEG Q2$/e+
HW DB 'Hello, world!$' e3rfXhp
Y\>\[*.v
CODESEG 3YRBI|XO
MOV AX, @data ;8EjjF [>
MOV DS, AX ok=40B99T
MOV DX, OFFSET HW GG>Y/;^
MOV AH, 09H Wy,"cT
INT 21H (lb`#TTGx
MOV AX, 4C00H 165WO}(;/
INT 21H eU"mG3__
END />!!ch
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x86 CPU,GNU/Linux,NASM 7CYH'DL
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). C[W5d~@;E
;Enter this into "hello.asm" then type: DoTs9w|5
;"nasm -f elf hello.asm" PoY>5
;"ld hello.o -o hello" vF+YgQ1H
;"./hello" 9 G((wiE
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section .data ;data section declaration Z#@6#S`
msg db 'Hello World!',0AH AYYRxhv_,
len equ $-msg ;string length V!}L<cN
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section .text ;code section declaration eFes+i( 35
global _start ;entry point (start of execution) K9LEIby
_start: mov edx,len ;string length =QTmK/(|B
mov ecx,msg ;string start *\C}Ok=
mov ebx,1 ;file handle: stdout mf#fA2[
mov eax,4 ;sys_write &F86SrsI
int 80h ;kernel system call 4=UI3 2v3
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mov ebx,0 ;return value ;,FT&|3o
mov eax,1 ;sys_exit _4~k3%w\`l
int 80h ;kernel system call I_K[!4~Kn
r \9:<i8
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x86 CPU,Windows,MASM32 s"#CkG
.386 -wBnwn-
.model flat,stdcall *j/uihY
option casemap:none JPHUmv6
;Include 文件定义 !OV|I
include windows.inc iczs8gj*
include user32.inc a_xQ~:H
includelib user32.lib _J+]SNk
include kernel32.inc jDFp31_X
includelib kernel32.lib 2c!h2$w
;数据段 d|R
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.data GsR-#tV@
szCaption db 'A MessageBox!',0 ,&-S?|
szText db 'Hello,world!',0 2f s9JP{^0
;代码段 ryz/rf
.code 4p*?7g_WVH
start: (}VuiNY<