Trace of matrix

#include <iostream>

using namespace std;

const int MAX = 100;

int FindTrace(int arr[][MAX], int n){
    int sum = 0;
    for(int i = 0; i < n; i++){
            sum += arr[i][i];
        }
    return sum;
}

int main(){
    int arr[][MAX] = {{2,5,8,4},
                      {3,5,8,4},
                      {8,4,9,5},
                      {4,9,6,2}};

    cout<<"Trace of Matrix: "<<FindTrace(arr,4)<<endl;
    return 0;
}