chris200x9
Dec 10, 2007, 07:50 PM
#include <iostream>
#include <string>
#include <fstream>
using namespace std;
class Shape
{
protected:
int x, y;
public:
Shape();
Shape( Shape& ref );
void SetOrigin( const int xx, const int yy );
virtual void Display();
virtual double Area();
virtual void read ( ifstream& );
};
class Rectangle : public Shape
{
private:
int length, width;
public:
Rectangle();
Rectangle( int l, int w );
void Display();
double Area();
};
class Triangle : public Shape
{
private:
int base, height;
public:
Triangle();
Triangle( int b, int h );
void Display();
double Area();
};
class Circle : public Shape
{
private:
int radius;
public:
Circle();
double Area();
void Display();
void read(ifstream&);
};
void Circle::read ( ifstream& infile )
{
infile >> x;
infile >> y;
infile >> radius;
}
Triangle::Triangle()
{
base = 0;
height = 0;
}
Triangle::Triangle( int b, int h )
{
base = b;
height = h;
}
double Triangle::Area()
{
return( 0.5 * base * height );
}
void Triangle::Display()
{
cout << "The triangle is at ";
cout << "( " << x << ", " << y << " )";
cout << endl;
}
Rectangle::Rectangle()
{
length = 0;
width = 0;
}
Rectangle::Rectangle( int l, int w )
{
length = l;
width = w;
}
double Rectangle::Area()
{
return( length * width );
}
void Rectangle::Display()
{
cout << "The rectangle is at ";
cout << "( " << x << ", " << y << " )";
cout << endl;
}
Circle::Circle()
{
radius = 0;
}
double Circle::Area()
{
return (3.14159*radius*radius);
}
void Circle::Display()
{
cout << "The circle is at ";
cout << "( " << x << ", " << y << " )";
cout << endl;
}
double Shape::Area()
{
return 0;
}
Shape::Shape()
{
x = 0;
y = 0;
}
Shape::Shape( Shape& ref )
{
x = ref.x;
y = ref.y;
}
void Shape::SetOrigin( const int xx, const int yy )
{
x = xx;
y = yy;
}
void Shape::Display()
{
cout << "The shape is located at ";
cout << "( " << x << ", " << y << " )";
cout << endl;
}
void Shape::read(ifstream&)
{
}
int main()
{
int shapenum;
string filename;
Shape* p[1000];
ifstream infile("infile.txt");
char c;
while ( infile)
{
switch (c) {
case 'C':
p[shapenum] = new Circle();
break;
case 'R':
p[shapenum] = new Rectangle();
break;
case 'T':
p[shapenum] = new Triangle();
break;
}
}
p[shapenum] -> read (infile);
}
I need some help filling out the code of what to do once the file is open.
the program should run from a file with input:
R 0 0 2 3
T 0 0 2 4
C 0 0 3
The first line defines a rectangle with origin at (0, 0), length 2, and width 3. The second line defines a triangle with origin at (0,0), base 2, and height 4. The third line defines a circle with origin at (0,0) and radius 3.
#include <string>
#include <fstream>
using namespace std;
class Shape
{
protected:
int x, y;
public:
Shape();
Shape( Shape& ref );
void SetOrigin( const int xx, const int yy );
virtual void Display();
virtual double Area();
virtual void read ( ifstream& );
};
class Rectangle : public Shape
{
private:
int length, width;
public:
Rectangle();
Rectangle( int l, int w );
void Display();
double Area();
};
class Triangle : public Shape
{
private:
int base, height;
public:
Triangle();
Triangle( int b, int h );
void Display();
double Area();
};
class Circle : public Shape
{
private:
int radius;
public:
Circle();
double Area();
void Display();
void read(ifstream&);
};
void Circle::read ( ifstream& infile )
{
infile >> x;
infile >> y;
infile >> radius;
}
Triangle::Triangle()
{
base = 0;
height = 0;
}
Triangle::Triangle( int b, int h )
{
base = b;
height = h;
}
double Triangle::Area()
{
return( 0.5 * base * height );
}
void Triangle::Display()
{
cout << "The triangle is at ";
cout << "( " << x << ", " << y << " )";
cout << endl;
}
Rectangle::Rectangle()
{
length = 0;
width = 0;
}
Rectangle::Rectangle( int l, int w )
{
length = l;
width = w;
}
double Rectangle::Area()
{
return( length * width );
}
void Rectangle::Display()
{
cout << "The rectangle is at ";
cout << "( " << x << ", " << y << " )";
cout << endl;
}
Circle::Circle()
{
radius = 0;
}
double Circle::Area()
{
return (3.14159*radius*radius);
}
void Circle::Display()
{
cout << "The circle is at ";
cout << "( " << x << ", " << y << " )";
cout << endl;
}
double Shape::Area()
{
return 0;
}
Shape::Shape()
{
x = 0;
y = 0;
}
Shape::Shape( Shape& ref )
{
x = ref.x;
y = ref.y;
}
void Shape::SetOrigin( const int xx, const int yy )
{
x = xx;
y = yy;
}
void Shape::Display()
{
cout << "The shape is located at ";
cout << "( " << x << ", " << y << " )";
cout << endl;
}
void Shape::read(ifstream&)
{
}
int main()
{
int shapenum;
string filename;
Shape* p[1000];
ifstream infile("infile.txt");
char c;
while ( infile)
{
switch (c) {
case 'C':
p[shapenum] = new Circle();
break;
case 'R':
p[shapenum] = new Rectangle();
break;
case 'T':
p[shapenum] = new Triangle();
break;
}
}
p[shapenum] -> read (infile);
}
I need some help filling out the code of what to do once the file is open.
the program should run from a file with input:
R 0 0 2 3
T 0 0 2 4
C 0 0 3
The first line defines a rectangle with origin at (0, 0), length 2, and width 3. The second line defines a triangle with origin at (0,0), base 2, and height 4. The third line defines a circle with origin at (0,0) and radius 3.
