c++ - no matching function for call to ‘Board::Board()’ -

this erros happening , don't know why. first of , want make battleship game , got classes , need implement few functions. i'm starting drawing board i'm having bad time. if someone's interested or made before , give me little help, i'd appreciate lot. final project semester , got rope on neck.

here's problem.

i have board class

class board { public:     board(const string &filename);     //bool putship(const ship &s);     void moveships();     //bool attack(const bomb &b);     void display()const;     void show()const;     void initializegrid();   private:     int numlines, numcolumns;     //vector <ship> ships;     vector <vector<int> > board; }; 

and player class

class player{ public:     player(string playername, string boardfilename);     void showboard() const;     //bomb getbomb() const;     //void attackboard(const bomb &b); private:     string name;     board board; }; 

and want create board reading dimensions txt (not done yet).

but when this:

player::player(string playername, string boardfilename){      name = playername;     board = boardfilename;  } 

and

void player::showboard() const{      board b01;  } 

i following error:

no matching function call ‘board::board()’

you have declared following constructor:

board(const string &filename); 

due this, default constructor not generated. why error in following line:

board b01;  // default ctor not exist