Input a number and check digits are in ascending order or not using while loop in C++

#include <iostream>
#include <conio.h>

using namespace std;

int main()
{
    int n,d,td=0,ld=10,asc=0;

    cout<<"Enter any number ";
    cin>>n;

    while(n>0)
    {
        d=n%10;
        if(d<ld)
        {
            ld=d;
            asc=asc+1;	// counting the digits present in the number in ascending order
        }
        td=td+1;		// counting the total number of digits
        n=n/10;
    }

    if(td==asc)
    {
        cout<<"All digits are in ascending order";
    }
    else
    {
        cout<<"All digits are not in ascending order";
    }
    return 0;
}