Enter nos. & display no. of odd, even & numbers entered.

//Program to enter 'n' numbers and display no. of odd, even and numbers entered till user wishes.
#include<iostream.h>
#include<conio.h>
void main()
{
    clrscr();
    int a=0,b,o=0,e=0;
    char z;
    do
    {
        ++a;
        cout<<"Enter a number: ";
        cin>>b;
        if(b%2==0)
        ++e;
        else
        ++o;
        cout<<"Enter another number? (y/n): ";
        cin>>z;
    }
    while(z=='y'||z=='Y');
    cout<<"Number of number entered: "<<a<<endl;
    cout<<"Number of even numbers: "<<e<<endl;
    cout<<"Number of odd numbers: "<<o<<endl;
    getch();
}