Direct Mapping Cache

import java.util.Scanner;

public class DirectMappingCache {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner sc = new Scanner(System.in);
        System.out.println("Enter main memory size : ");
        int a = sc.nextInt();
        System.out.println("Enter size of Cache Memory : ");
        int b = sc.nextInt();
        System.out.println("Size of each block : ");
        int c = sc.nextInt();
        int tag = (int) (Math.log(a/b)/Math.log(2));
        int set = (int) (Math.log(b/c)/Math.log(2));
        int word = (int) (Math.log(c)/Math.log(2));
        for (int i = 0; i < 3; i++) {
            System.out.print(" _______");
        }
        System.out.println();
        for (int i = 0; i < 3; i++)
            System.out.print("|       ");
        System.out.println("|");
        System.out.print("|   " + tag + "   ");
        System.out.print("|   " + set + "   ");
        System.out.print("|   " + word + "   ");
        System.out.println("|");

        for (int i = 0; i < 3; i++) {
            System.out.print("|_______");
        }
        System.out.println("|");
        System.out.print("   tag     set     word");

    }

}

/*
Enter main memory size :
65536
Enter size of Cache Memory :
4096
Size of each block :
16
 _______ _______ _______
|       |       |       |
|   4   |   8   |   4   |
|_______|_______|_______|
   tag     set     word
   */