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int sumdiagonal(int arr[3][3])
{ //declaring he sum variable
int sum=0;
for (int i=0; i<3;i++)
{
for (int j=0; j<3;j++)
{
//if the sum of index of elements=2
if(i+j==2)
{
//square the value
//add to sum variable
sum= sum+(arr[i][j]*arr[i][j]);
}
}
}
return sum;
}
//main function
int main()
{
//declare 2D array
int x[3][3];
//get user input for each elements
//using nested for loop
for(int i=0;i<3;i++)
{
for (int j=0;j<3;j++)
{
cout<<"Element at x[" << i << "][" <<j<< "]: ";
//user input
cin>>x[i][j];
}
}
//passing array to function
int sum=sumdiagonal(x);
//display the result
cout << "All element are:"<< endl;
for (int i=0; i<3;i++)
{
for (int j=0; j<3;j++)
{
cout << x[i][j]<<"\t";
}
cout <<endl;
}
cout <<"sum of square all major diagonal elements is"<<sum<< endl;
getch();
}