Thread: Raise Matrix to the power of....

Hi trying to raise a Matrix to the power of p, does not work. Where is my mistake.....

Thanks for help

Code:

 int main() 

  {
    int n, p;
    printf("Numer of Rows/Colums of sq matrix: ");
    scanf("%d", &n);
    printf("to the power of: ");
    scanf("%d", &p);

    int m[n][n];
    int r[n][n];

    printf("Elemnts\n");
    for ( int b = 0 ; b < n ; b++ ) {
        for ( int d = 0 ; d < n ; d++ ) {
            printf("[%d][%d] = ", b+1, d+1);
            scanf("%d", &m[b][d]);
        }
    }

    int s = 0;
    for (int i = 0; i < p; i++)
    {
        for ( int b = 0 ; b < n ; b++ )
        {
            for (int d = 0 ; d < n ; d++ )
            {
                for (int k = 0 ; k < n ; k++ )
                {
                    s += m[b][k]*m[k][d];
                }
                r[b][d] = s;
                s = 1;
            }
         }

        for ( int b = 0 ; b < n ; b++ ) {
            for ( int d = 0 ; d < n ; d++ ) {
                m[b][d] = e[b][d];
                r[b][d] = 0;
            }
        }
    }

    printf("RESULT:-\n");

    for (int c = 0 ; c < n ; c++ )
    {
        for (int d = 0 ; d < n ; d++ )
        {
            printf("%d   ", m[c][d]);
        }
        printf("\n");
    }

return 0;
}
 

You haven't declared e, although you presumably mean to say r there.
You reset s to 1 instead of 0.
You set m to the result after each multiplication which means that the next time you multiply it you aren't multiplying by the original m.