Constructors and destructors

constructors A constructor is a special member function whose task is to initialize the objects of its class. Class integer { Int m,n; Public: Integer(void); ………… ……….. }; Integer::integer(void) m=0;n=0; }

Parameterized constructors The constructors that can take arguments are called parameterized constructors. Class integer { int m,n; public: Integer(int x,int y); …… }; Integer::integer(int x, int y) m=x;n=y; }

Multiple constructors in a class In the first case,the constrector it self supplies the date values and no values are passed by the calling program. In the second case,the function call passes the appropriate values from main(). Class int { int m,n; public: Int() {m=0; n=0;} int(int a, int b) {m=a;n=b;} Int(int & i) {m=I; n=I,n;} };

Constructors with default arguments The actual parameter,when specified,overrides the default value

Dynamic initialization of objects This provieds the flexibility of using different format of date at run time depending upon the situasion

Copy constructor A copy constructor is used to declare and initialize an object from another object Integer (integer &i);