c++ – Error: expression must have a pointer type when using the this keyword
c++ – Error: expression must have a pointer type when using the this keyword
You have to use
this->grid[i*col + j].key1
this->grid[i*col + j].key2
That is because even if it is true that your grid is a pointer, you have allocated in the are pointed by its memory an array of Square object. So when you use the [] operator you are obtaining an object of type Square and not a Square* and for a Square object you hve to use the . operator and not the -> operator.
I guess this->grid is of type Square*, so this->grid[0] is of type Square& and you must use . (dot) not -> (arrow) to access members from Square&. To use arrow for expression expression must have a pointer type…
this->grid[i*col + j]->key2
// ^^: this->grid[i*col + j] is not a pointer
this->grid[i*col + j].key2
// ^ use dot to access key2 and key1 too