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C++ : Total Number of element in a array

Using the pointers


 #include <iostream>

using namespace std;
int main() {
   int arr[] = {12,5,8,9,7,5,3,2};
   int len = *(&arr + 1) - arr;
   cout << "Total number of elements in array is "<< len;
}    


or


Using the sizeof() function


#include <iostream>
using namespace std;
int main() {
   int arr[] = {12,5,8,9,7,5,3,2};
   int len = sizeof(arr)/sizeof(arr[0]);
   cout << "Total number of elements in array is "<< len;
}    
 

Output:

    Total number of elements in array is 8
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