```/* F08AE_A1W_F C++ Header Example Program.
*
* Copyright 2019 Numerical Algorithms Group.
* Mark 27, 2019.
*/

#include <nag.h>
#include <dco.hpp>
#include <stdio.h>
#include <math.h>
#include <iostream>
#include <string>
using namespace std;

int main(void)
{
/* Scalars */
Integer  exit_status = 0;
/* The following line is needed to force the Microsoft linker
to load floating point support */

cout << "F08AE_A1W_F C++ Header Example Program Results\n\n";

Integer ifail = 0;

// Skip heading in data file
string mystr;
getline (cin, mystr);

Integer m, n;
cin >> m; cin >> n;

Integer pda = m;
Integer lwork = 64 * n;

Integer tau_len;
if (m<n) {
tau_len = m;
} else {
tau_len = n;
}

// Allocate arrays
nagad_a1w_w_rtype *a = 0, *tau = 0, *a_in = 0, *work = 0;
double   *r = 0, *drda = 0;
a    = new nagad_a1w_w_rtype [m * n];
a_in = new nagad_a1w_w_rtype [m * n];
r    = new double [n * n];
drda = new double [n * m];

// Read A from data file
double   tmp;
for (int i = 0; i < m; ++i) {
for (int j = 0; j < n; ++j){
cin >> tmp;
a_in[i+j*m] = tmp;
}
}

for (int i = 0; i < m; i++) {
}
for (int i = 0; i < m*n; i++) {
a[i] = a_in[i];
}

f08ae_a1w_f_(ad_handle, m, n, a, pda, tau, work, lwork, ifail);
if (ifail != 0) {
printf("Error from f08ae_a1w_f_ .\n%" NAG_IFMT  " ", ifail);
exit_status = 1;
goto END;
}
for (int k = 0; k < n; ++k) {
for (int i = 0; i < n; ++i) {
}
}
for (int i = 0; i < n; ++i) {
int l = i*(m+1);
double inc = 1.0;

for (int j=0; j<m; ++j) {
int k = j*n + i;
}
}
NagError  fail;
INIT_FAIL(fail);
x04cac(Nag_ColMajor,Nag_UpperMatrix,Nag_NonUnitDiag,n,n,r,n,
"R from Q factorization of A",0,&fail);
printf("\nDerivatives of diagonal of R w.r.t. first col of A\n");
x04cac(Nag_ColMajor,Nag_GeneralMatrix,Nag_NonUnitDiag,n,m,drda,n,
"dR_ii/dA_j1",0,&fail);

END:
// Remove computational data object and tape