“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。 9Z4nAc
4K\G16'$v
将Hello World程序作为第一个学写的程序,现在已经成为一种传统。该程序最早出现在由Brian Kernighan和Dennis Ritchie写的计算机程序设计教程《C语言程序设计》。 8Vr%n2M
o~`/_+
以下是用不同语言写成的Hello World程序的几个例子: pH9VTM.*
Ada \NPmym_6J
with Ada.Text_Io; use Ada.Text_Io; .P8&5i)'P,
procedure Hello is fp`;U_-&0
begin ;ub;lh 3
Put_Line ("Hello, world!"); 5IE#\FITO|
end Hello; ZrpU <
d3\qKL!~
p M4 :#%V
汇编语言 Mk"^?%PxT
H?yK~bGQ
x86 CPU,DOS,TASM u_oaebOrpP
MODEL SMALL k\5c|Wq|g
IDEAL ~%<X0s|
STACK 100H La`N PY_:>
"~sW"n(F_
DATASEG -t!~%_WCv
HW DB 'Hello, world!$' (A9Fhun
0X6YdW _2X
CODESEG zdB^S%cztS
MOV AX, @data ~vm%6CABM
MOV DS, AX Z^3rLCa
MOV DX, OFFSET HW Fs9!S a7v
MOV AH, 09H (C\]-E>
INT 21H f6hnTbJ
MOV AX, 4C00H I|qo+u)
INT 21H )_HA>o_?C:
END p`olCp'
lXW%FH6c+
NG+GEqx
x86 CPU,GNU/Linux,NASM "L IF.)
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). M\uiq38
;Enter this into "hello.asm" then type: 3lrT3a3vV
;"nasm -f elf hello.asm" W+I!q:p4H
;"ld hello.o -o hello" /:m->
T
;"./hello" em%4Ap
Ni9/}bb
section .data ;data section declaration n]._uza
msg db 'Hello World!',0AH xQ7l~O
b
len equ $-msg ;string length -*1d!
f,U.7E
section .text ;code section declaration )|ju~qbf
global _start ;entry point (start of execution) P)Jgs
_start: mov edx,len ;string length L+b6!2O,
mov ecx,msg ;string start X_q\S g
mov ebx,1 ;file handle: stdout q+yQwX{
mov eax,4 ;sys_write f\|w'
int 80h ;kernel system call n@<YI
V'z1
mov ebx,0 ;return value Ua:}V n&!
mov eax,1 ;sys_exit ^UP`%egR
int 80h ;kernel system call &GpRI(OB/+
P78g/p T
g];!&R-
x86 CPU,Windows,MASM32 p_RsU`[
.386 >^u2cAi3[
.model flat,stdcall Snj'y,p[
option casemap:none ~[t[y~Hup
;Include 文件定义 Cjn#00
include windows.inc h79}qU
include user32.inc Z@4Arfl
includelib user32.lib q}3`|'3
include kernel32.inc rDdoOb]B
includelib kernel32.lib is?{MJZ_
;数据段 ? >7[7(|
.data \"7*{L:
szCaption db 'A MessageBox!',0 g9
.Q<