How can I store an array of complex numbers?

Question

I want to write code that takes a sequence of complex numbers and searches for a number in it. But I don't know how to write a function to form the sequence. This is what I've tried so far:

class complex { 
private:
    int real;
    int image; 
    int n;
    int *a;
    
public:
    complex(float l, float k) : real(l), image(k) {}
        
    float set(float l, float k)
    {
        cout << "enter size of array: ";
        cin >> n;
        for (int i = 0; i < n; i++)
        {
            cout << "enter real part: ";
            cin >> l;
            cout << "enter image part: ";
            cin >> k;
            *(a+i) = complex(l, k);
        }
    }
};

Answer 1

Because you arent allowed to use the library (which is stupid), what I would suggest is creating a struct to save the data

struct complexNum {             
  int real;        
  int imaginary;   
};

The other problem is that a is undefined as is and why not just use a[i]. Also instead why not create a typical array? You also dont need arguments or a return type for your function.

Something like:

class complex{  
    private:
        struct complexNum {             
            int real;        
            int imaginary;   
        };
        int n;
        complexNum* a;
    
    public:        
        void set()
        {
            cout<<"enter size of array: ";
            cin>>n;
            a = new complexNum[n];
            for (int i=0; i<n; i++)
            {
                complexNum num;
                cout<<"enter real part: ";
                cin>>num.real;
                cout<<"enter image part: ";
                cin>>num.imaginary;
                a[i]=num;
            }
        }
};