array in cpp

#include <iostream>
#include <string.h>
using namespace std;
class array{
    //int size;
    //int arr[size]={};
    public:
    int size;
    array(){
        size =10;
    }
    
    array(int x){
        size = x;
    }
    int arr[size]={};
    void input(){
        for (int i = 0; i < size; i++)
        {
            cout << endl;
            cout << "Enter " << i << " element ";
            cin >> arr[i];
        }
        
        
    }
    void traversal(){
        for (int i = 0; i < size; i++)
        {
            cout << arr[i] << " ";
        }
        
    }
    void insert(int pos, int element){
        for (int i = size; i < size-pos; i--)
        {
            arr[i]=arr[i+1];
        }
        arr[pos]=element;
        

    }
    void del(int pos){
        for (int i = pos; i < size-1; i++)
        {
            arr[i]= arr[i+1];
        }
        
    }

};
int func(){
    int x;
    cout << "|___________________________________________________|"<< endl;
    cout << "|choice           |                      description|" << endl; 

    cout <<"|_____   1   _____|Input elements in the array.     |"<< endl;
    cout <<"|_____   2   _____|Traversal the array.             |"<<endl;
    cout << "|_____   3   _____|Insert the element in the array. |"<<endl;
    cout << "|_____   4   _____|Delete an element in the array.  |"<<endl;
    cout << "|_____   0   _____|Exit the program.                |"<<endl;
    cout << "|---------------------------------------------------|"<< endl;
    cout <<"   CHOICE: ";
    cin >> x;
    return x;
}


int main(void){
    
    int a;
    //cout << "Do you want to perform operations so enter 9";
    cin >> a;
    array g(a);
    
    while (true)

    {
        int n;
        n = func();
        if (n==1)
        {
            g.input();
            continue;
        }
        if (n==2)
        {
            g.traversal();
            cout << endl;
        }
        if (n==3)
        {
            int pos,element;
            cout << "Enter position : ";
            cin >> pos;
            cout << "Enter element : ";
            cin >> element;
            g.insert(pos,element);
        }
        if (n==4)
        {
            /* code */
            int poss;
            cout << "Enter position : ";
            g.del(poss);
        }
        if(n==0)break;
        
        
        

        
    }

}

//problem
/*fix output after traversel 
enter documentation
use a string comparison*/