//C program to find trace
//and normal of given matrix
#include <stdio.h>
#include<math.h>

//Return Normal of a matrix 
//of size n * n
int findNormal(int mat[][3],
                 int n)
{
    int sum=0;

    //Run nested loop to access
    //elements of matrix
    for(int i=0;i<n;i++)
        for(int j=0;j<n;j++)
            sum+=mat[i][j] * mat[i][j];
    return sqrt(sum);
}

//Returns trace of a matrix of
//size n * n
int findTrace(int mat[][3],int n)
{
    int sum=0;
    
    //Run nested loop to access diagonal
    //elements of matrix
    for(int i=0;i<n;i++)
        sum+=mat[i][i];
    return sum;
}

//Driver code
int main() 
{
    int mat[3][3]={ {1,2,3},
                    {4,5,6},
                    {7,8,9} };
    printf("Normal of Matrix=%d\n",
          findNormal(mat,3));

    printf("Trace of Matrix=%d",
          findTrace(mat,3));
    return 0;
}