Question

Ive looked all over and I cant find anything relating to my problem. Im trying to write a class definition for a polygon class that basicly has a vector that holds pointers to a point. When I try to compile i keep geting the folllowing errors…

error C2143: syntax error : missing ‘;’ before ‘<‘
error C4430: missing type specifier – int assumed.
error C2238: unexpected token(s) preceding ‘;’
error C2061: syntax error : identifier ‘vector’
error C2065: ‘myPolygonPoints’ : undeclared identifier
error C2065: ‘points’ : undeclared identifier
error C2065: ‘myHasInstersection’ : undeclared identifier
error C2660: ‘Polygon::addSetOfPoints’ : function does not take 1 arguments

Here is the code to the class

#include "Point.h"
#include <vector>

class Point;

class Polygon
{
private:
    vector<Point*> myPolygonPoints;
    bool myHasIntersection;

public:
    void addSetOfPoints(vector<Point*> points)
    {
        myPolygonPoints = points;
    }

    bool getHasIntersection()
    {
        return myHasIntersection;
    }

    void setHasIntersection(bool intersection)
    {
        myHasInstersection = intersection;
    }

};

Answer 1

You are using vector from the std namespace without qualifying it.

You either have to do using namespace std;, or using std::vector, or declaring all your vector objects with the std namespace like std::vector.

#include "Point.h"
#include <vector>

class Point; // Assuming Point.h has this declared,
             // you don't need this forward declaration, but in reality,
             // you don't need to include Point.h
             // since you're only declaring pointers to Points

class Polygon
{
private:
    std::vector<Point*> myPolygonPoints;
    bool myHasIntersection;

public:
    void addSetOfPoints(std::vector<Point*> points)
    {
        myPolygonPoints = points;
    }

    bool getHasIntersection()
    {
        return myHasIntersection;
    }

    void setHasIntersection(bool intersection)
    {
        myHasInstersection = intersection;
    }

};