Question

number 4 in c++ please

Laboratory work 12 Investigation of using classes for describing class data-members Task 1. Study class members definition in C++ and CH. 2. Study class and members access modifiers in C++ and Ce 3. Study mechanisms creation, 4. Write programs in C++ and C which demonstrate use cases of class according to variant of creation, usage, and destruction of objects Object Oriented Programming-, laboratory works. Software Engineering dep NAU, 2019 Define class, as dynamic (CH) or static (C++) library. Inputoutput cperators are prohibited in class * Restrain class data-members direct alteration with the help of access modifiers. Yet provide . Class should have all types of constructors. Demoestrate each coestructor call while creating an * body availability to read that data In C++class should be defined with h and cpp files . Class should be used in separate project (console application). It is allowed to use input)joutput operators in console application for user interaction Variants Tasks Class Class members Triangle define the class, object get an object data; calculate and destructor, perimeter and square calculation methods, object's data retrieval |get its square and perimeter Vector define the class, objects get destructor, methods for calculation of polar an object data; calculate and coordinates, object's data retrieval methods get its polar coordinates String String value (digital characters). constructors, destructor, length calculation, string inversion methods, string value retrieval method define class, objects; get a string calculate and get its Triangle define class, objects; get an object data; calculate and get destructor, perimeter and square calculation methods, object's data retrieval its square and perimeter methods the coordinates of the segment beginning define class, objects; get an and the end, constructors, destructor, object length calculation method, method which length and angle with the Ox calculates angle between the Ox axis, object's data retrieval methods data; calculate and get axis String String value (small latin characters). constructors, destructor, length calculation string, calculate and get its define class, objects; get a

square method not mentioned

no sauare method was given. can thus be solved without a specific square mthod?

Answer 1

4)

triangle.h

#include<math.h>

class Triangle{
private:
float x1,y1; //A
float x2,y2; //B
float x3,y3; //C

public:
//Default constructor
Triangle(){
}
//-----------------------
//Parameterized constructor
Triangle(float x1,float y1,float x2,float y2,float x3,float y3){
this->x1=x1;
this->y1=y1;
this->x2=x2;
this->y2=y2;
this->x3=x3;
this->y3=y3;
}
//-----------------------
//initialize the coordinates
void setValue(float x1,float y1,float x2,float y2,float x3,float y3){
this->x1=x1;
this->y1=y1;
this->x2=x2;
this->y2=y2;
this->x3=x3;
this->y3=y3;
}
//----------------------------
//destructor
~Triangle(){
delete(this); //delete the object
}
//-----------------------
//finds the perimeter of the triangle
float perimeter(){
float AB;
float AC;
float BC;
float P;
//length of each three sides of the triangle
AB=sqrt((x2-x1)*(x2-x1) + (y2-y1)*(y2-y1));
AC=sqrt((x3-x1)*(x3-x1) + (y3-y1)*(y3-y1));
BC=sqrt((x3-x2)*(x3-x2) + (y3-y2)*(y3-y2));

P=AB+AC+BC;
return P;
}
//------------------------------------
//find the area of the circle
float area(){
float AB;
float AC;
float BC;
float S;
float A;
//length of each three sides of the triangle
AB=sqrt((x2-x1)*(x2-x1) + (y2-y1)*(y2-y1));
AC=sqrt((x3-x1)*(x3-x1) + (y3-y1)*(y3-y1));
BC=sqrt((x3-x2)*(x3-x2) + (y3-y2)*(y3-y2));
//Heron's formula to find the area of the triangle
S=(AB+AC+BC)/2;
A=sqrt(S*(S-AB)*(S-AC)*(S-BC));
return A;

}

};
//---------------------------------------------

triangle.cpp

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

using namespace std;

int main(){
Triangle *T=new Triangle(3,5,12,30,50,67);
cout<<"\nArea of the triangle= "<<T->area()<<" unit square"<<endl;
cout<<"Perimeter of the triangle= "<<T->perimeter()<<" unit"<<endl<<endl;

return 0;
}
//-----------------------------

OUTOUT:

Area of the triangle- 308.5 unit square Perineter of the triangle- 157.409 unit