"oh god why"
By gando (https://pastebin.com/u/gando)

URL: https://pastebin.com/V44MWbLQ
Created on: Friday 16th of September 2011 06:15:41 PM CDT
Retrieved on: Saturday 31 of October 2020 07:57:53 AM UTC


import java.util.Scanner;
public class converterClassAssignment 
{

	public static int exp( int base, int power )
	{
		int i = power;
		int z = base;
		int x = base;
		if (power == 1) { return base;}
		else if (power == 0) { return 1;}
//		else if (power == 2) {return base * base;}
		else if (base == 0) { return 0;}
		else
		{
			for (i = power;i > 1;i--)
			{
				z = z * x;
			}
			return z;
		}
	}
	public static void main(String[] args) 
	{
		int convertFromNumber = 0;
//		int convertResultNumber = 0;
		int convertFromBase = 0;
		int convertToBase = 0;
		int i = 0;
		int k = 0;
		int v = 0;
		int x = 0;
		int z = 0;
		int a = 0;
		int b = 0;
		double ver = 0.1;
		String[] hex = {"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "A", "B",	"C", "D", "E", "F" };
		StringBuffer tempConverterString2 = new StringBuffer("");
		String dashes = "----------------";
		String nl = "\n";
		String prompt = "$> ";
		Scanner in = new Scanner(System.in);
		
		System.out.println("Welcome to Base Converter version "+ver);
		System.out.println(dashes);
		System.out.println();
		System.out.print("Input the integer to convert from." + nl + prompt);
		convertFromNumber = in.nextInt();
		System.out.print(nl+"Input the base-N value to convert from." + nl + prompt);
		convertFromBase = in.nextInt();
			for(b = (Integer.toString(convertFromNumber).length()-1);b > 0;b--){if (Integer.parseInt(Integer.toString(convertFromNumber).substring(b,b+1)) > convertFromBase) { System.out.print("That number is invalid!");}}
		System.out.print(nl+"Input the base-M value to convert to."+nl+prompt);
		convertToBase = in.nextInt();
		if(convertFromBase>convertToBase)
			{
			v = convertFromNumber;
				while(((double)v)/convertToBase != 0)
					{
		
						i = v;
						v = i/convertToBase;
						x = i%convertToBase;
						tempConverterString2.append(x);
					}
	  		System.out.println(tempConverterString2.reverse());
			}
		else
		{
			StringBuffer tempConverterString = new StringBuffer(Integer.toString(convertFromNumber)).reverse(); // tempConverterString = 686
			for(i = 0;i <= tempConverterString.length()-1;i++)
			{
				k = Integer.parseInt(tempConverterString.substring(i,i+1)); // i == 0; k = 6
				b = exp(convertFromBase, i);
				z = k * b; // i == 0; k == 6; convertFromBase == 16; z = (6 * 16^0) == 6 // i == 1; k == 8; z = (8 * 16^1) = 128
				System.out.println("i: "+i+" k: "+k+" z: "+z+ " b: "+b);
				a += z;
//					if(convertToBase == 16)
//						tempConverterString2.append(hex[i]);
			}
			System.out.println(a);
		}
		

	}
}