Trace Of a Matrix

#include<stdio.h>

int main()
{

    int i,j,p,q,a[10][10],sum;

    printf("\nEnter the order of the matrix \n\n");
    scanf("%d",&p);

    printf("\nEnter the %d elements of the  matrix \n\n", p*p);

    for(i = 0; i< p; i++)
    {
        for(j = 0; j<p ; j++)
        {
            scanf("%d", &a[i][j]);
        }
    }

    printf("\nThe matrix is \n\n");
    for(i = 0; i< p; i++)
    {
        for(j = 0; j<p ; j++)
        {
            printf("%d\t", a[i][j]);
        }
        printf("\n");
    }

    sum=0;

    for(i=0; i<p ; i++)

    {
        sum= sum + a[i][i];

    }

    printf("\n\nThe Trace of  matrix is: %d \n\n", sum);

    return 0;
}

     

           

Note: Need to be arranged in compiler after copied

   

 OutPut:

Enter the order of the matrix 3 Enter the 9 elements of the matrix 1 2 3 4 5 6 7 8 9 The matrix is 1 2 3 4 5 6 7 8 9 The Trace of matrix is: 15