The trace of a square is given by the sum of the diagonal elements. Write a program to evaluate the trace of a matrix. Read the elements of matrix from keyboard and pass on its address to a function to evaluate and return the traces

   1:   #include<stdio.h>

   2:   #include<conio.h>

   3:   float trace(int n,float **x);

   4:   void main()

   5:   {

   6:   int i,j;

   7:   float *xx[10];

   8:   float t,x[10][10],num;

   9:   int n;

  10:   printf("Enter the size of matrix:\n");

  11:   scanf("%d",&n);

  12:   printf("Enter the elements:\n");

  13:   for(i=0;i<n;i++)

  14:   {

  15:      for(j=0;j<n;j++)

  16:      {

  17:      scanf("%f",&num);

  18:      x[i][j]=num;

  19:      }

  20:   }

  21:   for(i=0;i<n;i++)

  22:   xx[i]=x[i];

  23:   t=trace(n,xx);

  24:   printf("trace of matrix is: %f",t);

  25:   getch();

  26:   }

  27:   

  28:   float trace(int n,float **x)

  29:   {

  30:   int i;

  31:   float t=0.0;

  32:   for(i=0;i<n;i++)

  33:   t=t+*(*(x+i)+i);

  34:   return(t);

  35:   }