Tower of hanoi

#include<iostream.h>
void move(int n,char *s,char *i,char *d)
{
    if(n>0)
    {
        move(n-1,s,d,i);
        cout<<"Disk "<<n<<" is moved from "<<s<<" to "<<d<<endl;
        move((n-1),i,s,d);
    }
}
void main()
{
    int n;
    cout<<"Enter the number of disks ";
    cin>>n;
    if(n==0)
        cout<<"Invalid entry";
    move(n,"s","i","d");
}

Output:
Enter the number of disks 4
Disk 1 is moved from s to i
Disk 2 is moved from s to d
Disk 1 is moved from i to d
Disk 3 is moved from s to i
Disk 1 is moved from d to s
Disk 2 is moved from d to i
Disk 1 is moved from s to i
Disk 4 is moved from s to d
Disk 1 is moved from i to d
Disk 2 is moved from i to s
Disk 1 is moved from d to s
Disk 3 is moved from i to d
Disk 1 is moved from s to i
Disk 2 is moved from s to d
Disk 1 is moved from i to d
Press any key to continue