I am trying to calculate this continued fraction but i cant seem to work, the program however can be compiled properly but crashes while it works

Question

Im trying to get this program working as it requires to calculate continued fraction inputed in a linked list. the programme doesn't show any error however it always crashes in the middle. Can someone help me?

The task is simply to store the programme on a linked list and then calculate it by taking the parameter from the link. It is a continued fraction.

#include <iostream>
#include <cmath>
using namespace std;
struct node
{
    int data;
    node *next;
} *h=nullptr, *t=nullptr;

float calculation (int co)
{
    float a,c;
    node *b,*f;
    b->next = f;

    while(co != 0)
    {
        f = t;
        a = (float)f->data;
        a = 1/a;
        c = (float)b->data;
        a = c + a;
        t = b;
        co--;

    }

    return a;
}

void storedata (int& c)
{
    node *n = new node;
    n->data = c;
    n->next = nullptr;
    cout<<n->data<<endl;
    if(h==nullptr)
    {
        h=n;
        t=n;
        n=nullptr;
    }
    else
    {
        t->next=n;
        t=n;
    }

}
void formula (int a, int b, int co)
{
    int c;
    int z;
    while (co!=0)
    {
        c = a/b;
        storedata(c);
        z = b*c;
        z = a-z;
        a = b;
        b = z;
        co--;
    }
}

int main ()
{
    int a,b,c,z,co,d;
    float e;

    a = 123;
    b = 100;
    co = 5;
    formula (a,b,co);
    e = calculation(co);
    cout<<"cf1 = 123/100 ="<<e;
}

Answer 1

At least the following problems (some of which would be caught with warnings enabled, e.g. -Wall):

1. Using uninitialized pointers, e.g. node *b,*f; b->next = f;. This causes undefined behavior.

2. new but no delete anywhere, therefore memory leaks will be present.