Getline headache

[Wanderer]

I've got a class below that seems to skip the first getline call and I can't figure out why. All that is in the main function is the include for this class a call to the only function in it(mapgen).

#ifndef MAP_H 
#define MAP_H
#include <iostream>
#include <cstdlib>
#include <string>

using namespace std;

class map
{
public:
       char** cmap;
       int gridx;
       int gridy;
       string mapline;
       
       bool mapgen()
       {
		    mapline = "waffle";  // a test value
	    cout << "x: ";
            cin >> gridx;
            cout << endl <<"y: ";
            cin >> gridy;
            cout << endl << endl << "x: " << gridx << " and y: "<< gridy << endl << endl;
            if(gridx == 0){return false;}
            for(int i = 0; i < gridy; i++)
            {
			   cout << "map row:" << endl;
               getline(cin,mapline);  //this seems to be skipped when i = 0
               cout << endl << "map report: " << mapline;
               /*for(int j = 0; j < gridx; j++)
               {
				   cmap[i][j] = mapline[j];        
               } */  
            }
       return true;
       }
       

       
};

#endif 

The output I get looks like this, with input in italics:

x: 3

y: 3

x: 3 and y: 3

map row:

map report: map row:
aaa

map report: aaamap row:
bbb

map report: bbb
x: (...)

Thanks for your time and assistance.

[nvrmnd]

add cin.ignore() after cin >> gridy;

[Wanderer]

Thank you!!!