```/* F06YA_P0W_F C++ Header Example Program.
*
* Copyright 2019 Numerical Algorithms Group.
* Mark 27, 2019.
*/

#include <nag.h>
#include <nagx04.h>
#include <math.h>
#include <stdio.h>
#include <string>
#include <iostream>
using namespace std;

int main(void)
{
int       exit_status = 0;
Integer   ifail = 0;

cout << "F06YA_P0W_F C++ Header Example Program Results\n\n";
// Skip heading in data file
string mystr;
getline (cin, mystr);

// Read problem size and number of right-hand-sides
Integer m, n, k;
cin >> m >> n >> k;
double alpha, beta;
cin >> alpha >> beta;

// Allocate arrays containing A and its factorized form, B
// and the solution X.
double  *a=0, *b=0, *c=0;
a    =  new double  [k*m];
b    =  new double  [n*k];
c    =  new double  [m*n];

double dd;
for (int i = 0; i<k; ++i) {
for (int j = 0; j<m; ++j) {
cin >> dd;
Integer l = i + j*k;
a[l] = dd;
}
}
for (int i = 0; i<n; ++i) {
for (int j = 0; j<k; ++j) {
cin >> dd;
Integer l = i + j*n;
b[l] = dd;
}
}
for (int i = 0; i<m*n; ++i) {
c[i] = 1.0;
}

//  C = beta*C + alpha*A^T*B^T
ifail = 0;

cout << endl;
NagError  fail;
INIT_FAIL(fail);
x04cac(Nag_ColMajor,Nag_GeneralMatrix,Nag_NonUnitDiag,m,n,c,m,
"  Matrix C after update",0,&fail);

delete [] a;
delete [] b;
delete [] c;

return exit_status;
}
```