```/* nag_dtr_load (f16qgc) Example Program.
*
* Copyright 2017 Numerical Algorithms Group.
*
* Mark 26.2, 2017.
*/

#include <stdio.h>
#include <nag.h>
#include <nag_stdlib.h>
#include <nagf16.h>
#include <nagx04.h>

int main(void)
{

/* Scalars */
double alpha, diag;
Integer exit_status, n, pda;

/* Arrays */
double *a = 0;
char nag_enum_arg[40];

/* Nag Types */
NagError fail;
Nag_MatrixType matrix;
Nag_OrderType order;
Nag_UploType uplo;

#ifdef NAG_COLUMN_MAJOR
order = Nag_ColMajor;
#else
order = Nag_RowMajor;
#endif

exit_status = 0;
INIT_FAIL(fail);

/* Skip heading in data file */
scanf("%*[^\n] ");
/* Read the problem dimension */
scanf("%" NAG_IFMT "%*[^\n] ", &n);
scanf("%39s%*[^\n] ", nag_enum_arg);
/* nag_enum_name_to_value (x04nac).
* Converts NAG enum member name to value
*/
uplo = (Nag_UploType) nag_enum_name_to_value(nag_enum_arg);
scanf("%lf%lf%*[^\n] ", &alpha, &diag);

pda = n;

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

* Triangular matrix initialize.
*
*/
nag_dtr_load(order, uplo, n, alpha, diag, a, pda, &fail);
if (fail.code != NE_NOERROR) {
exit_status = 1;
goto END;
}

/* Print output */
/* nag_gen_real_mat_print (x04cac).
* Print real general matrix (easy-to-use)
*/
if (uplo == Nag_Upper)
matrix = Nag_UpperMatrix;
else
matrix = Nag_LowerMatrix;

fflush(stdout);
nag_gen_real_mat_print(order, matrix, Nag_NonUnitDiag,
n, n, a, pda, "Matrix A", 0, &fail);
if (fail.code != NE_NOERROR) {
printf("Error from nag_gen_real_mat_print (x04cac).\n%s\n", fail.message);
exit_status = 1;
goto END;
}

END:
NAG_FREE(a);

return exit_status;
}
```