Display table of a number till user wishes.

//Program to display table of a number till user wishes.
#include<iostream.h>
#include<conio.h>
void main()
{
    clrscr();
    int i,a;
    char z;
    do
    {
        clrscr();
        cout<<"Enter a number to display it's table: ";
        cin>>a;
        cout<<"Table of "<<a<<" is:"<<endl;
        for(i=1;i<=10;i++)
        cout<<a<<" X "<<i<<" = "<<a*i<<endl;
        cout<<"Do you wish to enter more? (y/n): ";
        cin>>z;
    }
    while(z=='y'||z=='Y');
}