Why I keep getting this error ?

Question

Hello, I keep receiving :" no matching function for call to 'MyClass1::MyClass1()' I looked over the code and cant find any flaw so whats the problem? Here is it:

#include <iostream>
using namespace std;

class MyClass1
{
public:
MyClass1(int regA,int consb)
:
a(regA), b(consb)
{

}
void ceva()
{

}
private:
int a;
const int b;
};
int main()
{

MyClass1 obj;
MyClass1*PtrObj = &obj;

PtrObj->MyClass1(1,2);

}

Answer 1

(1) you didn't define a constructor with 0 arguments, so you cannot declare
MyClass1 obj;
Solutions: (a) add a void constructor MyClass1() {}
(b) declare MyClass1 obj(1,2)
(2) PtrObj->MyClass1(1,2) is a nonsense, the object has already been constructed
(3) const members must be initialized as soon as they are defined: const int b=0;
(4) you must use your object to avoid a blocking warning.
For example, add: cout << PtrObj;

Answer 2

Thanks did (b), erased (2) and worked like a charm