C++

processroguishΛογισμικό & κατασκευή λογ/κού

18 Νοε 2013 (πριν από 3 χρόνια και 4 μήνες)

67 εμφανίσεις

Object Oriented Programming

IN C++

Chapter
1

INTRODUCTION

TO C++

Introduction


In this section we are going to give


a brief overview of the history of C and C++


a comparison at the key words of C and of C++


a quick revision of C usage


an examination of the dangers of traditional C


a quick look at the new features of C++ and how
they might be used to implement OOD

What Is C++


Compatible extension of c


Support Object Oriented Programming


Support for Data Abstraction

Background


C++ designed by Bjarne Stroustrup (AT&T Bell
Labs)


Originally only meant as a pre
-
processor to
improve on some of the inadequacies of C


First commercial release 1985


Even today many consider C++ is not an object
oriented
language

but rather an object oriented
compiler
-
linker
(subtle difference we'll learn
about later).

(Smalltalk)

C++

(Ada)

BPCL

Simula
67

Algol
68

(LISP)

C

Strengths and Weakness of C


Strengths


Flexible

(you can make mistakes in a wide variety of ways!)


Efficient

(you can make those mistakes very quickly!)


Available (everyone can make mistakes together!)


Portable

(you can transport those mistakes to other systems!)


Weaknesses


Very untidy syntax


Lack of type saftey


memory managment not automatic

Philosophy of C++


Keep the strengths and repair the
weaknesses


Efficiency is maintained


Compatability is maintained with C


Operate in all environments C can


Improved typing


Abstraction and Data encapulation vastly
improved

Key Words for C and C++

C and C++ Key Words

auto

break

case

char

const

continue

default

do

double

else

enum

extern

float

for

goto

if

int

long

register

return

short

signed

sizeof

static

struct

switch

typedef

union

unsigned

void

volatile

while

Additional C++ Key Words

asm

catch

class

delete

friend

inline

new

operator

private

protected

public

template

this

throw

try

virtual


What You Should Already Know:
Programming


Elementary Programming in C


simple declarations
including structures


user defined types
(typedef)


enumurator types (enum)


expressions


flow control


I/O


functions and modularity


pointers


basic memory allocation


basic data structures


(arrays, lists, trees)


Bibliography
-

main books


Object oriented programming using c++

IRA POHL
-

second edition, ADDISON
WESLEY



Effective C++

SCOTT MEYERS, ADDISON WESLEY



Introduction to OOP programming
-

T.Budd


The C++ programming lenguage
-

B.Stroustrup

#include <iostream.h>


void main(void)

{

cout << “c++ is an improved c
\
n” ;

}

The first c++ program

//cout <<“c++ is an improved c “<< endl ;

Input / Output

#include<iostream.h>


void main(void)

{

int a=
1000
;

cout << “a is “<<a<<endl;

cout <<“enter number”<<endl;

int b
;

cin >>b;

a+=b;

cout <<“ a is “<<a<<“ and b is “<<b<<endl;

}

Classes and Objects


A Class is a static description of a type


It
encapsulates

the data
and

all legal
operations on that data


It also defines who has access to that
data


An object is an
instance

of a class
(sometimes we say an instantiation)

Example of A Class

struct coord

{


int x;


int y;

};



struct coord location;


location.x =
7
;

location.y =
8
;

printf(“%d”,location.y);

class Coord

{

public:


int x;


int y;

};


Coord location;


location.x =
7
;

location.y =
8
;

cout << location.y;