Post on 04-Aug-2015
transcript
Kinan keshkeh
IT Engineering-Damascus University
3rd year
Summer course- 2014
2 bytes team
Welcome guys !
Smashing C++ !!
Classes & Structures
Structures !
Structures
• Holds pieces of data
Structures
• Holds pieces of data
Structures
• Holds pieces of data
struct structName{ ……….members …….. } its objects(if any) ;
Structures
• A member could be from a struct type .
struct Date{ int month; int day; int year; } x,y ; struct PersonInfo { double height;//in cm int weight;//in kg Date birthday; };
Structures
• A member could be from a struct type .
struct Date{ int month; int day; int year; } x,y ; struct PersonInfo { double height;//in cm int weight;//in kg Date birthday; };
You can define Like this or like this : Date x,y ;
Structures
• A member could be from a struct type .
struct Date{ int month; int day; int year; } x,y ; struct PersonInfo { double height;//in cm int weight;//in kg Date birthday; };
Don’t forget comma !
Structures
struct structName{ ……….members …….. } its objects(if any) ; ….. …… int main() { …. }
• This declaration must be Global , to be seen by all functions.
Structures
• It’s a type ! So it means :
struct Date{ int month; int day; int year; }
void get(Date x, int count )
Structures
struct Date{ int month; int day; int year; };
Date get (int z , int count )
• It’s a type ! So it means :
struct Date{ int month; int day; int year; } x,y ; struct PersonInfo { double height;//in cm int weight;//in kg Date birthday; };
Structures
PersonInfo christoph ; christoph.height=170; christoph.weight=70; christoph.birthday.month=10 ; christoph.birthday.day=3 ; christoph.birthday.year=1978 ;
• To reach to its members :
struct Date{ int month; int day; int year; } x,y ; struct PersonInfo { double height;//in cm int weight;//in kg Date birthday; };
Structures
PersonInfo christoph ; christoph.height=170; christoph.weight=70; christoph.birthday.month=10 ; christoph.birthday.day=3 ; christoph.birthday.year=1978 ;
• To reach to its members :
Structures
• Initialize :
struct Date{ int month; int day; int year; } x,y ; struct PersonInfo { double height;//in cm int weight;//in kg Date birthday; };
• Like Arrays
Structures
• Initialize :
struct Date{ int month; int day; int year; } x,y ; struct PersonInfo { double height;//in cm int weight;//in kg Date birthday; };
• Like Arrays
• Sequentially
Structures
• Initialize :
struct Date{ int month; int day; int year; } x,y ; struct PersonInfo { double height;//in cm int weight;//in kg Date birthday; };
• Like Arrays
• Sequentially
• PersonInfo
Structures
• Initialize :
struct Date{ int month; int day; int year; } x,y ; struct PersonInfo { double height;//in cm int weight;//in kg Date birthday; };
• Like Arrays
• Sequentially
• PersonInfo
• height
Structures
• Initialize :
struct Date{ int month; int day; int year; } x,y ; struct PersonInfo { double height;//in cm int weight;//in kg Date birthday; };
• Like Arrays
• Sequentially
• PersonInfo
• height • weight
Structures
• Initialize :
struct Date{ int month; int day; int year; } x,y ; struct PersonInfo { double height;//in cm int weight;//in kg Date birthday; };
• Like Arrays
• Sequentially
• PersonInfo
• height • weight • birthday
Structures
• Initialize :
struct Date{ int month; int day; int year; } x,y ; struct PersonInfo { double height;//in cm int weight;//in kg Date birthday; };
• Like Arrays
• Sequentially
• PersonInfo
• height • weight • birthday
• month • day • year
Structures
• Initialize :
struct Date{ int month; int day; int year; } x,y ; struct PersonInfo { double height;//in cm int weight;//in kg Date birthday; };
• Like Arrays
• Sequentially
• PersonInfo
• height • weight • birthday
• month • day • year
Structures
• Initialize :
struct Date{ int month; int day; int year; } x,y ; struct PersonInfo { double height;//in cm int weight;//in kg Date birthday; };
• Like Arrays
• Sequentially
• PersonInfo
• height • weight • birthday
• month • day • year
Structures
• Initialize :
struct Date{ int month; int day; int year; } x,y ; struct PersonInfo { double height;//in cm int weight;//in kg Date birthday; };
• Like Arrays
• Sequentially
• PersonInfo
• height • weight • birthday
• month • day • year
Structures
• Initialize :
struct Date{ int month; int day; int year; } x,y ; struct PersonInfo { double height;//in cm int weight;//in kg Date birthday; };
• Like Arrays
• Sequentially
• PersonInfo
• height • weight • birthday
• month • day • year
Structures
• Initialize :
struct Date{ int month; int day; int year; } x,y ; struct PersonInfo { double height;//in cm int weight;//in kg Date birthday; };
PersonInfo christoph ={170,70, 10,3,1978};
Structures
• Initialize :
struct Date{ int month; int day; int year; } x,y ; struct PersonInfo { double height;//in cm int weight;//in kg Date birthday; };
PersonInfo christoph ={170,70, 10,3,1978};
Structures
• Initialize :
struct Date{ int month; int day; int year; } x,y ; struct PersonInfo { double height;//in cm int weight;//in kg Date birthday; };
PersonInfo christoph ={170,70, 10,3,1978};
Structures
• Initialize :
struct Date{ int month; int day; int year; } x,y ; struct PersonInfo { double height;//in cm int weight;//in kg Date birthday; };
PersonInfo christoph ={170,70, 10,3,1978};
Structures
• Initialize :
struct Date{ int month; int day; int year; } x,y ; struct PersonInfo { double height;//in cm int weight;//in kg Date birthday; };
PersonInfo christoph ={170,70, 10,3,1978};
Structures
• Initialize :
struct Date{ int month; int day; int year; } x,y ; struct PersonInfo { double height;//in cm int weight;//in kg Date birthday; };
PersonInfo christoph ={170,70};
Structures
• Initialize :
struct Date{ int month; int day; int year; } x,y ; struct PersonInfo { double height;//in cm int weight;//in kg Date birthday; };
PersonInfo christoph ={170,70};
month=0; day=0; year=0;
Structures
• Initialize :
struct Date{ int month; int day; int year; } x,y ; struct PersonInfo { double height;//in cm int weight;//in kg Date birthday; };
PersonInfo christoph ={170,70};
month=0; day=0; year=0;
Structures
• Initialize :
struct Date{ int month; int day; int year; } x,y ; struct PersonInfo { double height;//in cm int weight;//in kg Date birthday; };
Note :
Unlike Array , when you initialize , if you pass the number of members !
You will have an Error !
& To save the memebers values !
Output:
Classes !
Classes
• It’s like a Struct.
• Its members could be Functions and data
• it supports( information hiding, data abstraction, and encapsulation )
Classes
• It’s like a Struct.
• Its members could be Functions and data
• it supports( information hiding, data abstraction, and encapsulation )
• private, only seen in the current class(for class functions) , unseen out of class !
• public, seen everywhere (in current class and out of class)
• We use two things in classes :
Classes
• It’s like a Struct.
• Its members could be Functions and data
• it supports( information hiding, data abstraction, and encapsulation )
• Mostly in each class , you might have get(privateto variables )and set(variablesprivate) functions
• private, only seen in the current class(for class functions) , unseen out of class !
• public, seen everywhere (in current class and out of class)
• We use two things in classes :
Classes
• Mostly in each class , you might have get(privateto variables )and set(variablesprivate) functions
Classes
• Mostly in each class , you might have get(privateto variables )and set(variablesprivate) functions
Accessor functions Mutator functions
Classes
class className{ private: ……….members …….. public: ……….members …….. } ;
Classes
class className{ private: ……….members …….. public: ……….members …….. } ;
Don’t forget!
• You can definitions them here !
• But it’s better not !
Returned type
Class name
“ : : “
• Output:
Classes
class className{ private: ……….members …….. public: ……….members …….. } ;
Classes
class className{ int num,den; public: ……….members …….. } ;
Classes
struct structName{ int num,den; …members …….. } ;
Classes
struct structName{ int num,den; …members …….. } ;
That’s for today
We’re finished !!
2 bytes team
Group : group link
Mobile phone- Kinan : 0994385748
Facebook account : kinan’s account
2 bytes team