/* nag_dtr_copy (f16qec) Example Program. * * Copyright 2005 Numerical Algorithms Group. * * Mark 8, 2005. */ #include #include #include #include #include int main(void) { /* Scalars */ Integer exit_status, i, j, n, pda, pdb; /* Arrays */ double *a=0, *b=0; char nag_enum_arg[40]; /* Nag Types */ NagError fail; Nag_DiagType diag; Nag_MatrixType matrix; Nag_OrderType order; Nag_TransType trans; Nag_UploType uplo; #ifdef NAG_COLUMN_MAJOR #define A(I,J) a[(J-1)*pda + I - 1] #define B(I,J) b[(J-1)*pdb + I - 1] order = Nag_ColMajor; #else #define A(I,J) a[(I-1)*pda + J - 1] #define B(I,J) b[(I-1)*pdb + J - 1] order = Nag_RowMajor; #endif exit_status = 0; INIT_FAIL(fail); Vprintf( "nag_dtr_copy (f16qec) Example Program Results\n\n"); /* Skip heading in data file */ Vscanf("%*[^\n] "); /* Read the problem dimension */ Vscanf("%ld%*[^\n] ", &n); /* Read uplo */ Vscanf("%s%*[^\n] ", nag_enum_arg); /* nag_enum_name_to_value(x04nac). * Converts NAG enum member name to value */ uplo = nag_enum_name_to_value(nag_enum_arg); /* Read trans */ Vscanf("%s%*[^\n] ", nag_enum_arg); /* nag_enum_name_to_value(x04nac). * Converts NAG enum member name to value */ trans = nag_enum_name_to_value(nag_enum_arg); /* Read diag */ Vscanf("%s%*[^\n] ", nag_enum_arg); /* nag_enum_name_to_value(x04nac). * Converts NAG enum member name to value */ diag = nag_enum_name_to_value(nag_enum_arg); pda = n; pdb = n; if (n > 0) { /* Allocate memory */ if ( !(a = NAG_ALLOC(n*pda, double)) || !(b = NAG_ALLOC(n*pdb, double)) ) { Vprintf("Allocation failure\n"); exit_status = -1; goto END; } } else { Vprintf("Invalid n\n"); exit_status = 1; return exit_status; } /* Read A from data file */ if (uplo == Nag_Upper) { for (i = 1; i <= n; ++i) { for (j = i; j <= n; ++j) Vscanf("%lf", &A(i,j)); } Vscanf("%*[^\n] "); } else { for (i = 1; i <= n; ++i) { for (j = 1; j <= i; ++j) Vscanf("%lf", &A(i,j)); } Vscanf("%*[^\n] "); } /* nag_dtr_copy(f16qec). * Triangular matrix copy. * */ nag_dtr_copy(order, uplo, trans, diag, n, a, pda, b, pdb, &fail); if (fail.code != NE_NOERROR) { Vprintf("Error from dtr_copy.\n%s\n", fail.message); 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; nag_gen_real_mat_print(order, matrix, Nag_NonUnitDiag, n, n, b, pdb, "Copy of Input Matrix", 0, &fail); if (fail.code != NE_NOERROR) { Vprintf("Error from nag_gen_real_mat_print (x04cac).\n%s\n", fail.message); exit_status = 1; goto END; } END: if (a) NAG_FREE(a); if (b) NAG_FREE(b); return exit_status; }