Binomial Coefficient for multiple numbers

[Medino]

I need some help with my homework, it is really important. I need to make outputs of binomial coefficients in range from 2 to 10. Now, I've managed to make a formula for giving me those numbers, and other formulas for incrementation and binomial coefficient also. I only need to put them together. Can someone rewrite the code for me. I'm really new to this codding stuff.

#include<iostream>
using namespace std;

int calcalting ()
{
    int n=2;
    int r=0;

do{
        if(n==r){
        n++;
        r=r*=0;}

        if (n<=10) {
        cout<<"n is " << n << endl << endl; }


        if (r!=n){
        r++;}

        if (r<=n) {
        cout << "r is " << r << endl << endl << endl ; }

}while(n<10 || r<10);

}

int factorial_a(int n) {
    if (n==1){
    return 1;}
    else{
      return n*factorial_a(n-1);
}
}

int factorial_b(int r) {
    if (r==1){
        return 1;
    }   else {
        return r*factorial_b(r-1);
    }
}


int factorial_c(int n - int r) {
    if (n-r==1){
        return 1;
    }   else {
        return (n-r)*factorial_c((n-r)-1); }
    }
}


int main () {
    int binomial_coefficient= factorial_a/(factorial_c * factorial_b)
    cout << binomial is << binomial_coefficient;
    return 0;
}

The final result in one of the lines should be something like this:

n is 7
binomial is 20
r is 4