C++ Programming Hi, I am having trouble calling on other functions in my print f

Question

C++ Programming

Hi, I am having trouble calling on other functions in my print function. We must print a character and its position on a grid. I have

void Shape::print(void) const

{

int i = 0;

char name = name();

int n = size();

cout << name << " ";

while (i < n)

{

cout << "(" << x[n] << "," << y[n] << ") ";

i++;

}

}

The name and size function vary depending on the letter, but for the sake of testing it out we have:

int I::size(void) const

{

return 0;

}

char I::name(void) const

{

return 'I';

}

I think it has to do with how I am calling it. I am including below part of the .h file and the main file in case it is relevant. Any help is appreciated!! Thank you!

class Shape

{

public:

virtual ~Shape(void);

virtual char name(void) const = 0;

virtual int size(void) const = 0;

void print(void) const;

void move (int dx, int dy);

bool overlap(const Shape &t) const;

static Shape *makeShape(char ch,int posx,int posy);

protected:

int *x, *y;

};

//

// testShape.cpp

//

#include "Shape.h"

#include <iostream>

#include <stdexcept>

using namespace std;

int main()

{

Shape *t1, *t2;

char ch;

int x,y;

try

{

cin >> ch >> x >> y;

t1 = Shape::makeShape(ch,x,y);

t1->print();

cin >> ch >> x >> y;

t2 = Shape::makeShape(ch,x,y);

t2->print();

t2->move(1,-1);

t2->print();

if ( t1->overlap(*t2) )

cout << "overlap" << endl;

else

cout << "no overlap" << endl;

delete t1;

delete t2;

}

catch ( invalid_argument &exc )

{

cout << exc.what() << ": " << ch << " " << x << " " << y << endl;

}

}

Explanation / Answer

#ifndef SHAPE
#include <iostream>
#include <stdexcept>
using namespace std;

class Shape
{
public:
virtual ~Shape(void);
virtual char sname(void) const = 0;
virtual int size(void) const = 0;
void print(void) const;
void move (int dx, int dy);
bool overlap(const Shape &t) const;
static Shape *makeShape(char ch,int posx,int posy);

protected:
int *x, *y;
};

#define SHAPE
#endif

void Shape::print(void) const
{
int i = 0;
char name = sname();
int n = size();
  
cout << name << " ";
while (i < n)
{
cout << "(" << x[n] << "," << y[n] << ") ";
i++;
}
  
}

int i::size(void)
{
return 0;
}

char i::sname(void)
{
return 'i';
}

int main()
{
Shape *t1, *t2;
char ch;
int x,y;
  
try
{
cin >> ch >> x >> y;
t1 = Shape::makeShape(ch,x,y);
t1->print();
cin >> ch >> x >> y;
t2 = Shape::makeShape(ch,x,y);
t2->print();
t2->move(1,-1);
t2->print();
  
if ( t1->overlap(*t2) )
cout << "overlap" << endl;
else
cout << "no overlap" << endl;
  
delete t1;
delete t2;
}
catch ( invalid_argument &exc )
{
cout << exc.what() << ": " << ch << " " << x << " " << y << endl;
}
return 0;
}

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