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#include <stdio.h>
#include <conio.h>

void main()
{
 int A[10][10], B[10][10], sumat[10][10], diffmat[10][10];
 int i, j, M,N, option;

 void trace (int arr[][10], int M, int N);

 clrscr();

 printf("Enter the order of the matrice A and Bn");
 scanf("%d %d", &M, &N);

 printf("Enter the elements of matrix An");
 for(i=0; i<M; i++)
 {
  for(j=0; j<N; j++)
  {
   scanf("%d",&A[i][j]);
  }
 }

 printf("MATRIX A isn");
 for(i=0; i<M; i++)
 {
  for(j=0; j<N; j++)
  {
   printf("%3d",A[i][j]);
  }
  printf("n");
 }

 printf("Enter the elements of matrix Bn");
 for(i=0; i<M; i++)
 {
  for(j=0; j<N; j++)
  {
   scanf("%d",&B[i][j]);
  }
 }

 printf("MATRIX B isn");
 for(i=0; i<M; i++)
 {
  for(j=0; j<N; j++)
  {
   printf("%3d",B[i][j]);
  }
  printf("n");
 }

 printf("Enter your option: 1 for Addition and 2 for Subtractionn");
 scanf("%d",&option);

 switch (option)
 {
 case 1: for(i=0; i<M; i++)
 {
  for(j=0; j<N; j++)
  {
   sumat[i][j] = A[i][j] + B[i][j];
  }
 }

 printf("Sum matrix isn");
 for(i=0; i<M; i++)
 {
  for(j=0; j<N; j++)
  {
   printf("%3d",sumat[i][j]) ;
  }
  printf("n");
 }

 trace (sumat, M, N);
 break;

 case 2:for(i=0; i<M; i++)
 {
  for(j=0; j<N; j++)
  {
   diffmat[i][j] = A[i][j] - B[i][j];
  }
 }

 printf("Difference matrix isn");
 for(i=0; i<M; i++)
 {
  for(j=0; j<N; j++)
  {
   printf("%3d",diffmat[i][j]) ;
  }
  printf("n");
 }

 trace (diffmat, M, N);
 break;
 }

}    /* End of main() */

/*Function to find the trace of a given matrix and print it*/

void trace (int arr[][10], int M, int N)
{
 int i, j, trace = 0;
 for(i=0; i<M; i++)
 {
  for(j=0; j<N; j++)
  {
   if (i==j)
   {
    trace = trace + arr[i][j];
   }
  }
 }
 printf ("Trace of the resultant matrix is = %dn", trace);

}

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