Header file and .cpp - Bugs ! - C++

[Kourosh23]

Instruction:

For practice write a header file code that includes your code, and write a .cpp file that tests your header file.

Your .cpp file must test for the size, and capacity of the underlying vector. It also must have a for loop that sends index values to append function, and then have your .cpp file to print all the values in your underlying array in the form of {1, 2, 3, ..., 25}.

My code:
There are some bugs which I don't know how to fix. Any help?

Question:
1. Is it possible to print things out using friend ostream& operator<< ?

// tutorial.h

#include <iostream>
#include <vector>
#include "cmpt_error.h"
#include <cassert>
#include <iomanip>
#include <cassert>
#include <cmath>

using namespace std;

class test {
private:
    int cap; // length of underlying pvay
    vector <int*> pv;
    //int* pv;     // pointer to the underlying pvay
    int size;     // # of elements in this test from user's perspective
public:

    // Default constructor (takes no parameters)
    test()
    : cap(10), pv{new int[cap]}, size(0)
    { }

    test(int sz, int fill_value)
    : cap(10), size(sz)
    {
        if (size < 0) cmpt::error("can't construct test of negative size");
        if (size > 0) cap += size;
        pv.push_back(new int[cap]);
        for(int i = 0; i < size; ++i){
            pv[i].push_back(fill_value);
        }
    }

    // Copy constructor
    test(const test& other)
    : cap(other.cap), pv(new int[cap]), size(other.size)
    {
        for(int i = 0; i < size; ++i) {
            pv[i] = other.pv[i];
        }
    }

    ~test() {
        delete[] pv;
    }

    int get_size() const {
        return size;
    }

    int get_cap() const {
        return cap;
    }

    int get(int i) const {
        if (i < 0 || i > size) cmpt::error("get: index out of bounds");
        return pv[i];
    }

    // Note that set is not a const method because it modifies the underlying
    // pvay.
    void set(int i, int x) {
        if (i < 0 || i > size) cmpt::error("get: index out of bounds");
        pv[i] = x;
    }


    friend ostream operator<< (ostream& output, const test& use){
    	if (pv.size() == 0) {
    		cout << "{}";
        } else {
            cout << "{";
            cout << pv[0];
            for (int i = 1; i < pv.size(); ++i) {  // i starts at 1 (not 0)
                cout << ", " << pv[i];
            }
            cout << "}";
        }
        cout << "\n";



    }

   void append(int x) {
       if (size >= cap) {
          cap = 2 * cap;          // double the cap
          int* new_pv = new int[cap]; // make new underlying pvay
                                            // twice size of old one

          for(int i = 0; i < size; ++i) {   // copy elements of v
             new_pv[i] = pv[i];           // into new_pv
          }

          delete[] pv;                     // delete old pv

          pv = new_pv;                    // assign new_pv
       }
       assert(size < cap);
       pv[size] = x;
       size++;
   }

}; 

// .cpp file

#include <iostream>
#include "Tutorials.h"
#include "cmpt_error.h"
#include <vector>
#include <cassert>
#include <iomanip>
#include <cassert>
#include <cmath>

using namespace std;


int main() {
    int_vec v;
    cout << "    v.size(): " << v.get_size() << "\n";
    cout << "v.capacity(): " << v.get_capacity() << "\n";
    for(int i = 0; i < 25; ++i) {
        v.append(i);
    }

   // Question: How to use ostream operator for output ?

}

Note: There are no outputs, since I my code contains bugs and no output option in main.

Note: To debug the code, you need to have cmpt_error.h header file, if not, just comment it out.

[ne555]

> you need to have cmpt_error.h header file, if not, just comment it out.
so I guess is not needed then.
could at least bother to provide a link to download it.


> There are some bugs which I don't know how to fix. Any help?
i won't wake up my mind reading cat, ¿can't you try to describe the bugs?
Also, http://www.cplusplus.com/forum/articles/40071/#msg216270


> Question: How to use ostream operator for output ?
cout << v;

[Kourosh23]

I see, yeah, it is a hassle reading this much code. I understand you.

The problem with the bugs are it is one after another. The main reason is that my prof code is written in pointer to an underlying array , but I wanted to try to se pointer toan underlying vector, just for practice, but it apparently causes me some bugs.

Ok, yes cout << v. That is it.

[cire]

The problem with the bugs are it is one after another.

The problem with your description of the "bugs" is that you give no description at all other than to say that they exist. What behavior occurs which differs from what you expect and how does it differ? If there are error messages include the text of the error messages.