2

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

void Inicializar (int M[][100], int n)
{ int i, j;

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

void  Soma (int M1[][100], int M2[][100], int n, int  MS[100][100])
{

    int i, j;
       for (i=0; i<n; i++)
    { for(j=0; j<n; j++)
    { MS[i][j] = M1[i][j] + M2[i][j];

}}}

   void Imprimir (int matriz[][100], int n)
   {
        int i, j;
       for (i=0; i<n; i++)
    { for(j=0; j<n; j++)
    { printf ("[%d][%d] = %d", i, j, matriz[i][j]);
}}}
 void Multiplicar (int A[][100], int B[][100], int n, int M[100][100])
 {
   int i, j;

       for (i=0; i<n; i++)
    { for(j=0; j<n; j++)
    { M[i][j] = A[i][j]*B[j][i] + A[i][j+1]*B[i+1][j];
}}}



main ()
{
    int A[100][100], n, B[100][100], S[100][100], op, M[100][100];

    do {
        printf ("Digite N:");
        scanf ("%d", &n);
    } while (n<2 || n>100);

    Inicializar(A,n);
    Inicializar(B, n);

    printf ("\n 1- SOMAR \n 2 -  MULTIPLICAR \n 3 - SAIR");
    scanf ("%d", &op);
    switch (op)
    {
        case 1:
          Soma (A, B, n, S);
            Imprimir(S, n);
            break;
            case 2:
            Multiplicar (A, B, n, M);
                Imprimir (M, n);
                break;
                case 3:
                   return 0;
                    break;
                }
                getch();


            }