program.cpp

#include<iostream>
using namespace std;
class Distance{
    private:
    int feet;
    float inches;
    public:
    //function to take input from the user
    void input(){
        cout << "Enter feet in integer :" << endl;
        cin >> feet;
        cout << "Enter inches in float :" << endl;
        cin >> inches;
    }
};
int main(){
    int size;
    cout << " enter the size of an array :" << endl;
    cin >> size;
    // dynaimically allocate size of array
    Distance* arr = new Distance[size];
    // take three input 
    int count = (size > 3)? : size; 
    for (int i = 0; i < count; i++)
    {
        cout << "Eneter three size of array " << i+1 << endl;
        arr[i].input();
    }
    delete[] arr;   
}