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viva [34]
3 years ago
11

Design a class named QuadraticEquation for a quadratic equation ax^2+bx+x=0. The class contains: **private data fields a, b, and

c that represents three coefficients. **a constructor for the arguments for a, b, and c. **three get methods for a, b, and c. **a method named getDiscriminant() that returns the discriminant, which is b2-4ac **the methods named getRoot1() and getRoot2() for returning two roots of the equation, or returning 0 if the discriminant is negative.[/color]
Computers and Technology
1 answer:
LenaWriter [7]3 years ago
4 0

Answer:

<em>C++</em>

///////////////////////////////////////////////////////////////////////////////////////////

#include <iostream>

using namespace std;

//////////////////////////////////////////////////////////////////

class QuadraticEquation {

   int a, b, c;

   

public:

   QuadraticEquation(int a, int b, int c) {

       this->a = a;

       this->b = b;

       this->c = c;

   }

   ////////////////////////////////////////

   int getA() {

       return a;

   }

   

   int getB() {

       return b;

   }

   

   int getC() {

       return c;

   }

   ////////////////////////////////////////

   // returns the discriminant, which is b2-4ac

   int getDiscriminant() {

       return (b*2)-(4*a*c);

   }

   

   int getRoot1() {

       if (getDiscriminant() < 0)

           return 0;

       else {

           // Please specify how to calculate the two roots.

           return 1;

       }

   }

   

   int getRoot2() {

       if (getDiscriminant() < 0)

           return 0;

       else {

           // Please specify how to calculate the two roots.

           return -1;

       }

   }

};

//////////////////////////////////////////////////////////////////

int main() {

   return 0;

}

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Answer:

The answer to this question can be given as:

Program:

#define class.

class PersonInfo:

   def __init__(self):  #constructor

       self.num_kids = 0

   def inc_num_kids(self):   #define function inc_num_kids()

       self.num_kids = self.num_kids + 1  

       return self.num_kids  #return value.

p= PersonInfo()      # creating object  

print('Kids:', p.num_kids)  #print value

p.inc_num_kids() #call function

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Output:

Kids: 0

New baby, kids now: 1

Explanation:

The description of the above python program as follows:

  • In this program firstly we define the class that is PersonInfo. In this class we define the constructor that is def __init__() and one function that is  def inc_num_kids().
  • The constructor is called automatically when the class object is created. In this constructor, we use the self as a parameter that is used to access variables that belong to class.
  • In the constructor, we define the variable that is "num_kids". We assign value to a variable that is "0" and use the self for holding reference to the variable.
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