Radix sort, C++ (gcc)

Radix sort

#include <iostream.h>
#include <conio.h>
#define MAX 10

class radixsort{
    int arr[MAX],n;
    public:
    void getdata();
    void showdata();
    void sortLogic();
};

void radixsort :: getdata(){
    cout<<"How many elements you require : ";
    cin>>n;
    for(int i=0;i<n;i++)
        cin>>arr[i];
}

void radixsort :: showdata(){
    cout<<"\n--Display--\n";
    for(int i=0;i<n;i++)
        cout<<arr[i]<<"   ";
}

void radixsort :: sortLogic(){
    //for base 10int temp;
    int bucket[10][20], buck_count[10], b[10];
    int i,j,k,r,no_of_passes=0,divisor=1,largest,pass_no;

largest=arr[0];

for(i=1;i<n;i++)  //Find the largest Number
    {
        if(arr[i] > largest)
            largest=arr[i];
    }

while(largest > 0)  //Find number of digits in largest number
    {
        no_of_passes++;
        largest /= 10;
    }

for(pass_no=0; pass_no < no_of_passes; pass_no++){

for(k=0; k<10; k++)
            buck_count[k]=0; //Initialize bucket countfor(i=0;i<n;i++){
            r=(arr[i]/divisor) % 10;
            bucket[r][buck_count[r]++]=arr[i];
        }
        i=0; //collect elements from bucketfor(k=0; k<10; k++){
            for(j=0; j<buck_count[k]; j++)
                arr[i++] = bucket[k][j];
        }

divisor *= 10;
    }
}

void main(){
    clrscr();
    cout<<"\n*****Radix Sort*****\n";
    radixsort obj;
    obj.getdata();
    obj.sortLogic();
    obj.showdata();
    getch();
}


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