Error running classes [closed] - c++

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Hello Im taking some C++ studies right now and Im seem to be stuck in Classes. I have made this program where I need to get the price of a slice of pizza. Simply I dont want to input data yet, just with static data in that is already in place.
Code is this :
#include <iostream>
#include <cmath>
using namespace std;
class Circle
{
public:
Circle()
{
radius = 0;
area = 0;
}
inline void setRadius(double r)
{
radius = r;
}
inline double getArea(double radius)
{
return 3.14 * pow(radius, 2);
}
private:
double radius;
double area;`
};
class Pizza
{
private:
double price;
double size;
double costperinch;
Circle Object;
public:
Pizza()
{
price = 0;
size = 0;
costperinch = 0;
}
~Pizza();
inline void setPrice(double p)
{
price = p;
}
inline void setSize(double radius)
{
size = Object.getArea(radius);
}
inline double costPeSqIn(double size, double price)
{
double costperinch = size * price;
}
};
int main()
{
Pizza myPizza;
myPizza.setPrice(5.0);
myPizza.setSize(3.14);
cout << "The cost per square inch of the pizza is ";
cout << myPizza.costPeSqIn(myPizza.setSize, myPizza.setPrice);
return 0;
}
I get the following errors:
Error 1 error C3867: 'Pizza::setSize': function call missing argument
list; use '&Pizza::setSize' to create a pointer to
member c:\users\jorge\documents\visual studio 2013\projects\object
composition\object composition\main 7.21.cpp 91 1 Object Composition
Error 2 error C3867: 'Pizza::setPrice': function call missing argument
list; use '&Pizza::setPrice' to create a pointer to
member c:\users\jorge\documents\visual studio 2013\projects\object
composition\object composition\main 7.21.cpp 91 1 Object Composition

Answer 1

Your problem is the line
cout << myPizza.costPeSqIn(myPizza.setSize, myPizza.setPrice);
at the end of your code. Your compiler complains because setSize and setPrice are functions but you didn't provide them with arguments. I doubt that you wanted to do this in the first place any-ways.
I actually think you wanted to have:
inline double costPeSqIn()
{
return size * price;
}
as implementation of your costPeSqIn function and the line above with the error should be
cout << myPizza.costPeSqIn();
it makes way more sense that way to me.
The way you currently pass the setter functions into costPeSqIn doesn't make sense, also your original costPeSqIn declared a double return type but didn't return anything.
As for the problem with the destructor, you got:
~Pizza();
and therefore got your destructor declared. Once you declare a destructor yourself the compiler won't auto generate one for you, but since you don't have a definition anywhere either your code is ill formed.
To fix this you either gotta provide a definition of it, e.g.:
~Pizza()
{
// whatever code you want
}
or delete the declaration so that the compiler will auto-generate a default constructor for you.