Why can we not print the valur of 'var' without obj.printinfo function.? What is the role of this function?

Question

#include <iostream>
using namespace std;

class MyClass {
public:
MyClass(int a) : var(a)
{ }
void printInfo() {
cout << var <<endl;
cout << this->var <<endl;
cout << (*this).var <<endl;
}
private:
int var;
};

int main() {
MyClass obj(42);
obj.printInfo();
}

Answer 1

Because we marked var to be private. That means we can access it like obj.var. We have to use some method from within the object.