Question

I am trying to use the “find” function here. For that here’s the code for the ‘==’ operator. But I am getting a “too many parameters for this operator function” error at the word “operator”.

Can anyone kindly help me out ? Thanks.

struct gr_log
{
   string name;
   string category;
   string description;
   float cost;
   bool operator==(const gr_log& l, const gr_log& r) const

   {
           return l.name == r.name;
  }

};

And:

vector<gr_log>::iterator it;
it = find (grocery.begin(), grocery.end(), "Sugar");

Answer 1

A member operator only takes one argument:

struct gr_log
{
   string name;
   string category;
   string description;
   float cost;
   bool operator==(const gr_log& r)
   {
       return name == r.name;
   }
};

Alternatively, you could write a friend operator:

struct gr_log
{
   string name;
   string category;
   string description;
   float cost;
   friend bool operator==(const gr_log& l, const gr_log& r)
   {
       return l.name == r.name;
   }
};

Also, you’ll need to perform a find using an instance of gr_log because you can’t compare a gr_log with a string like you’re trying to do:

it = find (grocery.begin(), grocery.end(), gr_log("Sugar"));