BaseXToBase10

/* 
 * Author: Gracia Rivas
 * Precondition: True 
 * Postcondition: program prints the numeric value on base 10, from a predefined input. 
 */

package base_conversion;
import java.lang.Math;
import java.util.Scanner; 

public class BASEX_TO_BASE10 {
	
	public static void main(String[] args) {
			Scanner input = new Scanner(System.in); 
			int number = 0, base = 0; 
			System.out.println("Type a number in base 2 or base 8:"); 
			number = input.nextInt(); 
			System.out.println("Was it base 2 or  base 8?:");
			base = input.nextInt(); 
			System.out.println(convert_to_base_10(base,number)); 
	}
	
	/*Precondition: both base and number must be integers. 
	 *Postcondition: returns an integer value. 
	 *This method calculates a value in base x and converts it to base 10. 
	*/
	public static int convert_to_base_10(int base, int number){
		int exponent = 0, remainder = 0, answer = 0, temp_total = number; 
		while(temp_total > 0) {
			remainder = temp_total % 10;
			answer = answer + (int) (remainder * Math.pow(base, exponent++));
			temp_total = temp_total / 10; 
		}
		return answer; 
	}
}