I'm creating a battleship game, and I want to create a class that I can use for each type of ship (i.e. destroyer, battleship, etc.). The class (Ship) is fine itself, but when I try to call member functions, I get the error message "error: invalid use of non-static member function". I'm pretty sure it has to do with an error with the way I declared the class or member functions.
Here's the relevant portion of the code if it helps (I know it's probably not very efficient, but I'm not done with it yet anyway).
#include <iostream>
#include <string>
#include <sstream>
//classes
class Ship
{
std::string name;
int length;
int stype;
public:
Ship(int length1, std::string name1, int stype1);
std::string get_name();
int get_len();
int get_type();
};
Ship::Ship(int length1, std::string name1, int stype1)
{
name = name1;
length = length1;
stype = stype1;
}
std::string Ship::get_name()
{
return name;
}
int Ship::get_len()
{
return length;
}
int Ship::get_type()
{
return stype;
}
//functions
void setup();
int ship_place(std::string shiptype, std::string shiplen, int ship, int length);
//global variables
Ship destroyer(2,"Destroyer",1);
Ship submarine(3,"Submarine",2);
Ship cruiser(3,"Cruiser",3);
Ship battleship(4,"Battleship",4);
Ship carrier(5,"Carrier",5);
int main()
{
setup();
return 0;
}
void setup()
{
std::cout << "I-am-setupbot.You-are-required-to-place-all-five(5)-of-your-ships-on-your-board." << std::endl;
ship_place(destroyer.get_name, "1x2", destroyer.get_type, destroyer.get_len);
ship_place(submarine.get_name, "1x3", submarine.get_type, submarine.get_len);
ship_place(cruiser.get_name, "1x3", cruiser.get_type, cruiser.get_len);
ship_place(battleship.get_name, "1x4", battleship.get_type, battleship.get_len);
ship_place(carrier.get_name, "1x5", carrier.get_type, carrier.get_len);
// an error gets thrown on all 5 of the above lines for (shipvariable).get_name . When I remove the first portion, an error gets thrown for the get_type as well, as would the get_len.
}
//function I use to set the positions of the 5 ships (not important).
int ship_place(std::string shiptype, std::string shiplen, int ship, int length)
{
//had to delete stuff b/c too many characters
}
Here's the error messages:
main.cpp: In function ‘void setup()’:
main.cpp:159:80: error: invalid use of non-static member function ‘std::string Ship::get_name()’
ship_place(destroyer.get_name, "1x2", destroyer.get_type, destroyer.get_len);
^
main.cpp:26:13: note: declared here
std::string Ship::get_name()
main.cpp:160:80: error: invalid use of non-static member function ‘std::string Ship::get_name()’
ship_place(submarine.get_name, "1x3", submarine.get_type, submarine.get_len);
^
main.cpp:26:13: note: declared here
std::string Ship::get_name()
main.cpp:161:74: error: invalid use of non-static member function ‘std::string Ship::get_name()’
ship_place(cruiser.get_name, "1x3", cruiser.get_type, cruiser.get_len);
^
main.cpp:26:13: note: declared here
std::string Ship::get_name()
main.cpp:162:83: error: invalid use of non-static member function ‘std::string Ship::get_name()’
ship_place(battleship.get_name, "1x4", battleship.get_type, battleship.get_len);
^
main.cpp:26:13: note: declared here
std::string Ship::get_name()main.cpp:163:74: error: invalid use of non-static member function ‘std::string Ship::get_name()’
ship_place(carrier.get_name, "1x5", carrier.get_type, carrier.get_len);
^
main.cpp:26:13: note: declared here
std::string Ship::get_name()If anybody could help, it would be sincerely appreciated.