In C++, members of a structure can be accessed using the dot (.) operator or the arrow (->) operator, depending on whether the variable is an instance of the structure or a pointer to the structure.

To access a member of a structure using the dot operator, the syntax is as follows:

struct MyStruct {
  int x;
  int y;
};

MyStruct s;
s.x = 1;
s.y = 2;

To access a member of a structure using the arrow operator, the syntax is as follows:

MyStruct* ps = new MyStruct;
ps->x = 1;
ps->y = 2;

In this case, the arrow operator is used because ps is a pointer to a MyStruct object, not an instance of the structure itself.