/* nag_blast_dtr_load (f16qgc) Example Program.
*
* Copyright 2024 Numerical Algorithms Group.
*
* Mark 30.1, 2024.
*/
#include <nag.h>
#include <stdio.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);
printf("nag_blast_dtr_load (f16qgc) Example Program Results\n\n");
/* Skip heading in data file */
scanf("%*[^\n] ");
/* Read the problem dimension */
scanf("%" NAG_IFMT "%*[^\n] ", &n);
/* Read uplo */
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);
/* Read scalar parameters */
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;
}
/* nag_blast_dtr_load (f16qgc).
* Triangular matrix initialize.
*
*/
nag_blast_dtr_load(order, uplo, n, alpha, diag, a, pda, &fail);
if (fail.code != NE_NOERROR) {
printf("Error from nag_blast_dtr_load (f16qgc).\n%s\n", fail.message);
exit_status = 1;
goto END;
}
/* Print output */
/* nag_file_print_matrix_real_gen (x04cac).
* Print real general matrix (easy-to-use)
*/
if (uplo == Nag_Upper)
matrix = Nag_UpperMatrix;
else
matrix = Nag_LowerMatrix;
fflush(stdout);
nag_file_print_matrix_real_gen(order, matrix, Nag_NonUnitDiag, n, n, a, pda,
"Matrix A", 0, &fail);
if (fail.code != NE_NOERROR) {
printf("Error from nag_file_print_matrix_real_gen (x04cac).\n%s\n",
fail.message);
exit_status = 1;
goto END;
}
END:
NAG_FREE(a);
return exit_status;
}