2-array-passing

#include <iostream>
#include <vector>

using namespace std;

void readN(int &m);
int WriteSequence(int m);
int CountToArray(int A[],int m);
void WriteArray(int A[],int e1);

int main()
{
    int n;
    readN(n);
    int cnt=0;
    cnt=WriteSequence(n);
    cout<<" -> "<<" in the sequence we have "<<cnt<<" numbers."<<endl;

    int X[100];
    cnt=CountToArray(X,n);
    WriteArray(X,cnt);




    return 0;
}

void readN(int &m)
{
    cin>>m;
}

bool even(int what)
{
    return ((what%2)==0);
}


int WriteSequence(int m)
{
    int j=0, i=m;
    cout<<"Sequence: ";

    while(i>1)
    {
        if(even(i))
            {i=i/2;}

        else {i=i*3+1;}

        j++;
        cout<<"->"<<i;

    }


    return j;

}

int CountToArray(int A[],int m)
{
    int j=0, i=m;
    cout<<"Sequence: ";

    while((i>1)&&(j<100))
    {
        if(even(i))
            {
                i=i/2;


            }

        else {i=i*3+1;}
        A[j]=i;

        j++;


    }


    return j;


}

void WriteArray(int A[],int e1)
{
    cout<<"array: ";
    for(int i=0;i<e1;i++)
    {
        cout<< " -> "<<A[i];
    }

    cout<<endl;
}