```/* F07FJ_P0W_F C++ Header Example Program.
*
* Copyright 2019 Numerical Algorithms Group.
* Mark 27, 2019.
*/

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

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

cout << "F07FJ_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 n;
cin >> n;

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

// Read the lower triangular matrix A, register and copy
double dd;
for (int i = 0; i<n; ++i) {
for (int j = 0; j<=i; ++j) {
int k = i + j*n;
cin >> a[k];
}
}

// Factorize the matrix A
ifail = 0;
f07fd_p0w_f_(ad_handle,"L",n,a,n,ifail,1);

// Get the inverse of A
ifail = 0;
f07fj_p0w_f_(ad_handle,"L",n,a,n,ifail,1);

// Print inverse
cout << endl;
NagError  fail;
INIT_FAIL(fail);
x04cac(Nag_ColMajor,Nag_LowerMatrix,Nag_NonUnitDiag,n,n,a,n,
"  Inverse",0,&fail);

delete [] a;
return exit_status;
}
```