main.cpp

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#include <cassert>
#include <iostream>
#include <numeric>      // iota
 
using namespace std;
 
 
void init_Carray(int n, double *x);
 
void init_Carray(int n, double *x)
{
    assert(n >= 0);
    iota(x,x+n,3);
}
 
//void print_Carray(int n, double const * const x)
void print_Carray(int n, double const x[])     // hidden pointer x
{
    assert(n >= 0);
    for (int k=0; k<n; ++k)
    {
                cout << x[k] << "  ";
        }
        cout << endl;
        delete[] x;               // dangerous side effect
}
 
 
int main()
{
    cout << "Dangerous Pointer" << endl;
    int n;
    cout << "Number of elements  n = "; cin >>n;
    
    double* const v = new double [n];
    init_Carray(n,v);
    
    print_Carray(n,v);
    
    v[0] = -3;
    
    print_Carray(n,v);
 
    delete[] v;
 
    return 0;
}