Write a program that lets you work withtriangles. The program should let a user

Question

Write a program that lets you work withtriangles. The program should let a user create a triangle with a default base of 1 and a height of 1. The program should provide a way to increase or decrease the above mentioned dimensions by a value of 1

A function to validate user input 3. A function to display the menu 4. The function main() should only be a collection of function calls. 5. Comment your code and use meaningful or mnemonic variable names.

MUST USE given .h files

#ifndef Triangle_H
#define Triangle_H
#include <iostream>
using namespace std;

class Triangle;//forward declaration

           //some compilers require to prototype the << and >> operator functions
ostream &operator <<(ostream & someStream, const Triangle & someTriangle); // Overloaded << operator

class Triangle
{
public:
   Triangle();//default value of base = 1 and height = 1;
   Triangle(double base, double height);

   //mutators
   void setBase(double b);//used to set the value of the base
   void setHeigth(double h);//used to set the value of the height

                           //Accessors
   double getBase() const;
   double getHeight()const;
   double getArea()const;

   // Overloaded operators
   Triangle operator ++();               // Prefix ++       increase the size of the base by 1 abd height by 1
   Triangle operator ++(int);           // Postfix ++       increase the size of the base by 1 abd height by 1
   Triangle operator --();               // Prefix --       decrease the size of the base by 1 abd height by 1
   Triangle operator --(int);           // Postfix --       decrease the size of the base by 1 abd height by 1

   friend ostream &operator <<(ostream &, const Triangle &); // Overloaded << operator
                                                           /*Use this operator to display on the screen the value of the base, the height and the area of the triangle
                                                           */

private:
   double base;
   double height;
};
#endif

Explanation / Answer

Here is the complete program

#include <iostream>
using namespace std;
class Triangle;//forward declaration
//some compilers require to prototype the << and >> operator functions
ostream &operator <<(ostream & someStream, const Triangle & someTriangle); // Overloaded << operator
class Triangle
{
public:
Triangle();//default value of base = 1 and height = 1;
Triangle(double base, double height);
//mutators
void setBase(double b);//used to set the value of the base
void setHeigth(double h);//used to set the value of the height
//Accessors
double getBase() const;
double getHeight()const;
double getArea()const;
// Overloaded operators
Triangle operator ++(); // Prefix ++ increase the size of the base by 1 abd height by 1
Triangle operator ++(int); // Postfix ++ increase the size of the base by 1 abd height by 1
Triangle operator --(); // Prefix -- decrease the size of the base by 1 abd height by 1
Triangle operator --(int); // Postfix -- decrease the size of the base by 1 abd height by 1
friend ostream &operator <<(ostream &, const Triangle &); // Overloaded << operator
/*Use this operator to display on the screen the value of the base, the height and the area of the triangle
*/
private:
double base;
double height;
};

Triangle::Triangle()
{
   this->base=1;
   this->height=1;
}
Triangle::Triangle(double base, double height)
{
   this->base=base;
   this->height=height;
}
void Triangle::setBase(double base)
{
   this->base=base;
  
}
void Triangle::setHeigth(double height)
{
   this->height=height;
  
}
double Triangle::getHeight() const
{
  
   return height;
}
double Triangle::getBase() const
{
  
   return base;
}
double Triangle::getArea() const
{
  
   return (height*base)/2;
}
Triangle Triangle:: operator ++(int a)
{
   Triangle t2(base+1, height+1);
   cout << t2.base;
   return t2;
}
Triangle Triangle:: operator --(int a)
{
   Triangle t(base-1, height-1);
   return t;
}
ostream &operator <<(ostream &out, const Triangle &t)
{
   out <<"Base:"<<t.base<<" Height:"<< t.height<<" Area:"<<t.getArea()<<endl;
   return out;
}

void menu(Triangle &t)
{
   cout << "Triangle created "<<t;
   int c;
   while(true)
   {
       cout << "Please enter 1 increase dims 2 to decrease dims 3 to display triangle 4 to exit ";
       cin >>c;
       if(c==0)
           break;
       else if(c==1)
       {
           t=t++;
           cout << t;
       }
       else if(c==2)
       {
           t=t--;
           cout <<t;
       }
       else if(c==3)
       {
           cout <<t;
       }
   }
}

void main()
{
   Triangle t(2,1);
  
   menu(t);
  
  
}

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