Would this code not work for finding last occurence

#1

#include
using namespace std;
int last_occ(int *arr,int n,int key)
{
if(n==0)
{
return -1;
}
if(arr[n] == key)
{
return n;
}
last_occ(arr,n-1,key);
}

main()
{
int arr[] = {1,2,3,4,5,6,5,4,4,5,5};
int key = 4;
int n = sizeof(arr) / sizeof(int);
cout<<last_occ(arr,n,key);

}

#2

hello @dhruvtrehan45
image
here u should use return statement.
ie return last_occ(arr,n-1,key);

also should compare arr[n-1] == key becuase n is indicating length .
rest everthing is correct in ur code.

#3

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