```/* nag_matop_real_gen_matrix_pow (f01eqc) Example Program.
*
* Copyright 2019 Numerical Algorithms Group.
*
* Mark 27.0, 2019.
*/
#include <math.h>
#include <nag.h>

#define A(I,J) a[J*pda + I]

int main(void)
{
/* Scalars */
Integer exit_status = 0;
Integer i, j, n, pda;
double p;
/* Arrays */
double *a = 0;
/* Nag Types */
Nag_OrderType order = Nag_ColMajor;
NagError fail;

INIT_FAIL(fail);

/* Output preamble */
printf("nag_matop_real_gen_matrix_pow (f01eqc) ");
printf("Example Program Results\n\n");
fflush(stdout);

/* Skip heading in data file */
scanf("%*[^\n] ");

/* Read in the problem size and the required power */
scanf("%" NAG_IFMT "", &n);
scanf("%lf", &p);
scanf("%*[^\n]");

pda = n;
if (!(a = NAG_ALLOC(pda * n, double)))
{
printf("Allocation failure\n");
exit_status = -1;
goto END;
}

/* Read in the matrix A from data file */
for (i = 0; i < n; i++) {
for (j = 0; j < n; j++) {
scanf("%lf", &A(i, j));
}
}
scanf("%*[^\n] ");

/* Find matrix pth power using
* nag_matop_real_gen_matrix_pow (f01eqc)
* General power of a real matrix
*/
nag_matop_real_gen_matrix_pow(n, a, pda, p, &fail);
if (fail.code != NE_NOERROR) {
printf("Error from nag_matop_real_gen_matrix_pow (f01eqc)\n%s\n",
fail.message);
exit_status = 1;
goto END;
}

/* Print matrix A^p using
* nag_file_print_matrix_real_gen (x04cac)
* Print real general matrix (easy-to-use)
*/
nag_file_print_matrix_real_gen(order, Nag_GeneralMatrix, Nag_NonUnitDiag,
n, n, a, pda, "A^p", NULL, &fail);
if (fail.code != NE_NOERROR) {
printf("Error from nag_file_print_matrix_real_gen (x04cac)\n%s\n", fail.message);
exit_status = 2;
goto END;
}

END:
NAG_FREE(a);
return exit_status;
}
```