```/* nag_imax_val (f16dnc) Example Program.
*
* Copyright 2014 Numerical Algorithms Group.
*
* Mark 9, 2009.
*/

#include <stdio.h>
#include <nag.h>
#include <nag_stdlib.h>
#include <nagf16.h>

int main(void)
{
/* Scalars */
Integer  exit_status, i, incx, j, k, n, xlen;
/* Arrays */
Integer  *x = 0;
/* Nag Types */
NagError fail;

exit_status = 0;
INIT_FAIL(fail);

printf("nag_imax_val (f16dnc) Example Program Results\n\n");

/* Skip heading in data file */
scanf("%*[^\n] ");
/* Read the number of elements and the increment */
scanf("%ld%ld%*[^\n] ", &n, &incx);

xlen = MAX(1, 1 + (n - 1)*ABS(incx));

if (n > 0)
{
/* Allocate memory */
if (!(x = NAG_ALLOC(xlen, Integer)))
{
printf("Allocation failure\n");
exit_status = -1;
goto END;
}
}
else
{
printf("Invalid n\n");
exit_status = 1;
goto END;
}

/* Input vector x */
for (j = 0; j < xlen; j = j + incx)
scanf("%ld", &x[j]);
scanf("%*[^\n] ");

/* nag_imax_val (f16dnc).
* Get maximum value (i) and location of that value (k)
* of Integer vector */
nag_imax_val(n, x, incx, &k, &i, &fail);

if (fail.code != NE_NOERROR)
{
printf("Error from nag_imax_val (f16dnc).\n%s\n", fail.message);
exit_status = 1;
goto END;
}

/* Print the maximum value */
printf("Maximum element of x is %12ld\n", i);
/* Print its location */
printf("Index of maximum element of x is %3ld\n", k);

END:
NAG_FREE(x);

return exit_status;
}
```