指针数组，数组里面每个元素指向一个对象
一个指针数组，数组里面每个元素指向一个对象shape，然后就出错了，please help me !!!

class shape{

protected:
double xCoord,yCoord;
public:
shape(double x,double y) : xCoord(x),yCoord(y){}
virtual double area() const{return 0.0;}

};//.............................

class Triangle{

protected:

shape* p[3];

public:
Triangle();
double area() const;


};//.................................

Triangle::Triangle(){
*p=new shape(0,0); //这里有错，下同
p++;
*p=new shape (3,0);
p++;
*p=new shape(3,4);
}

double Triangle::area() const {
return 1.1;

}//................................

[解决办法]

Triangle::Triangle()
{
  *p = new shape(0,0);  //这里有错，下同
  *(p+1) = new shape (3,0);
  *(p+2) = new shape(3,4);
}

[解决办法]
p[0]=new shape(0,0);

p[1]=new shape (3,0);

p[2]=new shape(3,4);
[解决办法]
p是一个指针数组的首地址， p是不能当作左值的， 所以p++是不行的
[解决办法]

class shape{

protected:
double xCoord,yCoord;
public:
shape(double x,double y) : xCoord(x),yCoord(y){}
virtual double area() const{return 0.0;}

};//.............................

class Triangle{

protected:

shape* p[3];

public:
Triangle();
double area() const;


};//.................................

Triangle::Triangle(){
p[0]=new shape(0,0); 

p[1]=new shape (3,0);

p[2]=new shape(3,4); 
}

double Triangle::area() const {
return  1.1;

}//................................