Question

Write a C++ Function that adds up 4 diagonal values in a 2-D Array that are diagonal of each other

Answer 1

#include<iostream>

using namespace std;

int add4Diagonal(int arr[][4]){
   int sum = 0;
   for(int i = 0;i<4;i++){
      sum += arr[i][i];
   }
   return sum;
}

int main() {
   int arr[4][4] = {{1,2,3,4},
            {5,6,7,8},
            {9,0,1,2},
            {3,4,5,6}};
   
   cout<<"Sum of 4 diagonal values = "<<add4Diagonal(arr)<<endl;
   return 0;
}

int add4Diagonal(int arr[][4]){
   int sum = 0;
   for(int i = 0;i<4;i++){
      sum += arr[i][i];
   }
   return sum;
}