I have the following problem. I have a class that has declared a virtual function. When I call the virtual function I get an access violation with the code 0xC0000005. Here is an example program so that you can understand the problem

My header

#include <iostream>
class Test{
  public:
  virtual void display(int* i);
  int run();
};

My cpp

int Test::run{
    int a = 3;
    int *ptrA = &a;
    display(ptrA); 
    
    if(*ptrA>2){//Here I get my access violation message
    enter code here
    }

return 1;
}

void Test::display(int* i){
    
    std::cout<< *i;
}

And my Main

int main() {
    Test t;
    t.run();
    
}

When I execute the display function, I get the access violation error message. If I remove the function then it works and if I remove virtual from the function display it also works. The function is not implemented anywhere else.

For this reason I do not understand why I get this error message.