Hey everyone, I am having some difficulties knowing how to assign city to the list. Can anyone help? Thanks!

Code:
class DestinationList
{
private:   
int num;                       // number of objects in the list
Destination list[MAX_CITIES];  // array of destinations


public:


int Add(string city)
{
   num = 0;
   list[num] = city;
   num++;
}
};