Question

7.24 LAB: Triangle area comparison (classes)

Language: C++

Given class Triangle (in files Triangle.h and Triangle.cpp), complete main() to read and set the base and height of triangle1 and of triangle2, determine which triangle's area is larger, and output that triangle's info, making use of Triangle's relevant member functions.

Ex: If the input is:

3.0 4.0
4.0 5.0

where 3.0 is triangle1's base, 4.0 is triangle1's height, 4.0 is triangle2's base, and 5.0 is triangle2's height, the output is:

Triangle with larger area:
Base: 4.00
Height: 5.00
Area: 10.00

Answer 1

Program

/*** Triangle.h ***/

//Triangle.h
#ifndef TRI_H

#define TRI_H

//Triangle class declaration
class Triangle
{
private:
//private data members
float base;
float height;
public:
//constructor
Triangle(float b=0,float h=0);
//accessors functions
float getBase();
float getHeight();
//mutators functions
void setBase(float b);
void setheight(float h);
//calculate area
float getArea();
//print the triangle
void print();
};

#endif //TRI_H

/*** Triangle.cpp ***/

//Triangle.cpp
#include<iostream>
#include<iomanip>
#include "Triangle.h"
using namespace std;

//parameterized constructor
Triangle::Triangle(float b,float h)
{
base = b;
height = h;
}

/* accessors functions */

//function to return base
float Triangle::getBase()
{
return base;
}
//function to return height
float Triangle::getHeight()
{
return height;
}

/*mutators functions*/

//function to set base
void Triangle::setBase(float b)
{
base = b;
}
//function to set height
void Triangle::setheight(float h)
{
height = h;
}

//calculate area
float Triangle::getArea()
{
return (0.5*base*height);
}

//print the triangle
void Triangle::print()
{
cout<<fixed<<setprecision(2);
cout<<"Base: " <<base<<endl;
cout<<"Height: "<<height<<endl;
cout<<"Area: "<<getArea()<<endl;
}

/*** main.cpp ***/

#include <iostream>
#include"triangle.h"

using namespace std;

//main function
int main()
{
Triangle t1, t2;
float base, height;
cout<<"Enter base: ";
cin >>base;
cout<<"Enter height: ";
cin >>height;
t1.setBase(base);
t1.setheight(height);

cout<<"Enter base: ";
cin >>base;
cout<<"Enter height: ";
cin >>height;
t2.setBase(base);
t2.setheight(height);

cout<<"Triangle with larger area:"<<endl;
if(t1.getArea()>t2.getArea())
t1.print();
else
t2.print();

return 0;
}

Output:

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