Cpp program to insert any number in a sorted array using function

Write a cpp program to insert any number in a sorted array while maintaining the order using function 

#include<iostream>
using namespace std;
int INSRT(int[],int,int);
int main(){
    int arr[50],N,i,pos,ITEM,index;
    cout<<"Enter the desired array size "<<endl;
    cin>>N;
    cout<<"Enter the elements(Sorted in ascending order) "<<endl;
    for(i=0;i<N;i++)
    {
        cin>>arr[i];
    }
    cout<<"Enter the number which needs to be inserted";
    cin>>ITEM;
    index=INSRT(arr,N,ITEM);
    if(N==50)
    {
        cout<<"Overflow!!";
        exit(1);
    }
    cout<<"Index is:"<<index<<endl;
    for(i=N;i>index;i--)
    {
        arr[i]=arr[i-1];
    }
    arr[index]=ITEM;
    N+=1;
    for(i=0;i<N;i++)
    {
        cout<<arr[i]<<" ";
    }
}
    int INSRT(int arr[],int size, int num)
    {
        int pos;
        //finding position of that number
        for(int i=0;i<size;i++)
        {
             if(num<arr[0])
            {
                 pos=0;
                 break;
            }
            else if(arr[i]<=num && arr[i+1]>num)
            {
                pos=i+1;
                 break;
            }
            else
            {
                pos=size-1;
            }
        }
        return pos;
    }

    

Enter the desired array size 

5

Enter the elements(Sorted in ascending order) 

2

4

6

8

10

Enter the number which needs to be inserted 7

Index is:3

2 4 6 7 8 10