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C++ Class method not working properly


New Coder
I have to make class Buffer with 3 private members: kapacitet - capcity of buffer, brojElemenata - number of elements in buffer, and bafer - buffer array in which elements are stored; public function push which stores element in bafer.
Here is my code:
#include <iostream>
using namespace std;
class Buffer
int kapacitet;
int brojElemenata;
int *bafer = new int[kapacitet];
kapacitet = 0;
brojElemenata = 0;
Buffer(int n)
kapacitet = n;
brojElemenata = 0;
delete [] bafer;
void push(int el)
if(brojElemenata >= kapacitet)
cout << "Bafer is full." <<endl;
bafer[brojElemenata] = el;
int main()
cout << "** BUFFER **"<<endl;
Buffer b(2);
Everything is compiled good, with no errors, but when I run code in some cases it doesnt work.
For example:
when I try to push value greater than 3 it outputs this:
** BUFFER **
terminate called after throwing an instance of 'std::bad_array_new_length'
what(): std::bad_array_new_length
Aborted (core dumped)
In cases I push values equally or lower than 3 it works.
Does someone has explanation for this?

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