Substract

Question

How a class function can access another member of a class
Example:
class otherthing{
};
class somthing{
Public:
Int waka=1000;
};
class another:public otherthing{
Public:
Int chapa=100;
Void patanga() {
waka=waka-chapa;
}
};
Int main () {
another a;
otherthing *p1=&a;
p1->patanga();
}
What's the problem?

Answer 1

What do you want to do?
And where have you declared a class otherthing?

Answer 2

Substract those two

Answer 3

#include <iostream>
using namespace std;

class somthing{
public:
int waka=1000;
};
class another:public somthing {
public:
int chapa=100;
int patanga() {
waka=waka-chapa;
return waka;
}
};
int main() {
another a;
another* p1=&a;
cout << p1->patanga();

return 0;
}

This works.
You created class otherthing for no reason and you tried to inherit from it. Above all that you tried to create a pointer of that. Please try to understand everything you write. I am saying that because your variable waka was in class somthing and that is the reason you couldn't subtract things.