/* F11XE_P0W_F C++ Header Example Program.
*
* Copyright 2024 Numerical Algorithms Group.
* Mark 30.2, 2024.
*/
#include <dco.hpp>
#include <iostream>
#include <nag.h>
#include <nagad.h>
#include <nagx04.h>
#include <stdio.h>
using namespace std;
int main()
{
int exit_status = 0;
nag::ad::handle_t ad_handle;
Integer ifail = 0;
cout << "F11XE_P0W_F C++ Header Example Program Results\n\n";
// Skip heading in data file
string mystr;
getline(cin, mystr);
// Read order of matrix and number of nonzero entries
Integer n, nnz;
cin >> n;
cin >> nnz;
double * a = 0, *x = 0, *y = 0;
Integer *icol = 0, *irow = 0;
a = new double[nnz];
x = new double[n];
y = new double[n];
icol = new Integer[nnz];
irow = new Integer[nnz];
// Read the matrix A
for (int i = 0; i < nnz; i++)
{
cin >> a[i] >> irow[i] >> icol[i];
}
// Read the vector x
for (int i = 0; i < n; i++)
{
cin >> x[i];
}
// Calculate matrix-vector product
ifail = 0;
nag::ad::f11xe(ad_handle, n, nnz, a, irow, icol, "C", x, y, ifail);
// Output results
cout.setf(ios::scientific, ios::floatfield);
cout.precision(4);
cout << " Matrix-vector product" << endl;
for (int i = 0; i < n; ++i)
{
cout.width(12);
cout << y[i] << endl;
}
delete[] a;
delete[] x;
delete[] y;
delete[] icol;
delete[] irow;
return exit_status;
}