basic OOP questions panicked student need help plz!

Question

im having issues with a program im trying to finish. Its a simple mortgage payment program where i use different classes and all that. I have instantiated the classes fine and can pass the value back out of the derived class back to the base class. My problem right now lies w/ the passing the values into the derived class by properties. I have 3 values (2 integers and one double for interest rate). I have to use a constructor where i dont kno what i need to put in there,guess im supposed to pass the values in this. Then have 3 properties and i dont know if they should be public or private or protected or shared, but i think i need both get and set right? If anyone could please help me out i would be very grateful this thing is due tomorrow and i have about 20 hrs into it! thanx in advance

p.jones · Answer

If you make a class and instantiate objects from it then the variables within it shall almost certainly not be shared. Shared means teh variable exists once at class level and all objects see that one variable. If you make the variable public then intellisense will allow it to be set directly from other objects. However normally these things are kept private and you can implement get/set functions on it. You can also manually write public functions to get and set. You know that the object doing the instantiation needs to retain a reference to the object it wants to operate on.