Question

10. Number Array Class Design a class that has an array of floating-point numbers. The constructor should accept an integer argument and dynamically allocate the array to hold that many numbers. The private data members of the class should include the integer argument in a variable to hold the size of the array and a pointer to float type to hold the address of the first element in the array. The destructor should free the memory held by the array. In addition, there should be member functions to perform the following operations: • Store a number in any element of the array • Retrieve a number from any element of the array • Return the highest value stored in the array • Return the lowest value stored in the array • Return the average of all the numbers stored in the array Demonstrate the Class in a Program

Answer 1

Here is the completed code for this problem. Assuming the language is C++. Please don’t forget to mention the language while you post a question in future.

Comments are included, go through it, learn how things work and let me know if you have any doubts or if you need anything to change. If you are satisfied with the solution, please rate the answer. If not, PLEASE let me know before you rate, I’ll help you fix whatever issues. Thanks

#include<iostream>

using namespace std;

//NumberArray class

class NumberArray{

                //instance variables

                float *arr;

                int size;

public:

                //constructor taking capacity

                NumberArray(int capacity){

                                //assigning capacity to size

                                size=capacity;

                                //initializing dynamic float array

                                arr=new float[size];

                                //initializing all elements to 0

                                for(int i=0;i<size;i++){

                                                arr[i]=0;

                                }

                }

               

                //destructor to delete memory occupied by arr

                ~NumberArray(){

                                delete[] arr;

                }

               

                //method to set a value at a specific index

                void set(int index, float value){

                                //assuming index is valid, assigning value at this index

                                arr[index]=value;

                }

               

                //method to fetch a value at a given index, assuming index is valid

                float get(int index) const{

                                return arr[index];

                }

               

                //returns the lowest element in the array

                float lowest() const{

                                float min=0;

                                //looping through elements

                                for(int i=0;i<size;i++){

                                                //if this is first element or this number is less than min, updating min

                                                if(i==0 || arr[i]<min){

                                                                min=arr[i];

                                                }

                                }

                                return min;

                }

               

                //returns the highest element in the array

                float highest() const{

                                float max=0;

                                for(int i=0;i<size;i++){

                                                if(i==0 || arr[i]>max){

                                                                max=arr[i];

                                                }

                                }

                                return max;

                }

               

                //returns the average of all numbers in the array

                float average() const{

                                float sum=0;

                                //summing values

                                for(int i=0;i<size;i++){

                                                sum+=arr[i];

                                }

                                //finding and returning average

                                float avg=(float) sum/size;

                                return avg;

                }

};

//a simple main method for testing

int main(){

                //creating a NumberArray of size 5

                NumberArray array(5);

               

                //assigning some values in each index

                array.set(0,2);

                array.set(1,2.5);

                array.set(2,-8);

                array.set(3,13.25);

                array.set(4,10.2);

                //displaying array elements using get method

                cout<<"Array: ";

                for(int i=0;i<5;i++){

                                cout<<array.get(i)<<" ";

                }

                cout<<endl;

                //displaying highest, lowest and average values

                cout<<"Highest: "<<array.highest()<<endl;

                cout<<"Lowest: "<<array.lowest()<<endl;

                cout<<"Average: "<<array.average()<<endl;

                return 0;

}

/*OUTPUT*/

Array: 2 2.5 -8 13.25 10.2

Highest: 13.25

Lowest: -8

Average: 3.99