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Master Gruppe 2 #38

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Master Gruppe 2 #38

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40 changes: 20 additions & 20 deletions src/main/java/de/cas/mse/exercise/SumDigPower.java
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Original file line number Diff line number Diff line change
Expand Up @@ -5,37 +5,37 @@

public class SumDigPower {

public List<Long> sumDigPow(long a, long b) {
public List<Long> sumDigPow(long lowerBoundInclusive, long upperBoundExclusive) {

List<Long> result = new ArrayList<Long>();
List<Long> eurekaNumbers = new ArrayList<Long>();

for (long i = a; i < b; i++) {
for (long currentNumber = lowerBoundInclusive; currentNumber < upperBoundExclusive; currentNumber++) {

List<Long> longs = new ArrayList<Long>();

String temp = Long.toString(i);

// Split values
for (int j = 0; j < temp.length(); j++) {
longs.add(Long.valueOf(temp.substring(j, j + 1)));
}

// Create sum
String currentNumberAsString = Long.toString(currentNumber);

long sum = 0;
for (int j = 1; j <= longs.size(); j++) {
sum += Math.pow(longs.get(j - 1), j);
for (int digitIndex = 0; digitIndex < currentNumberAsString.length(); digitIndex++) {
long digit = getDigit(currentNumberAsString, digitIndex);
sum += Math.pow(digit, getDigitExponent(digitIndex));
}

// Test if sum is equal
if (sum == i) {
result.add(sum);
if (sum == currentNumber) {
eurekaNumbers.add(sum);
}

}

System.out.println(result);
return result;
System.out.println(eurekaNumbers);
return eurekaNumbers;

}

private int getDigitExponent(int digitIndex) {
return digitIndex + 1;
}

private long getDigit(String currentNumber, int index) {
return Long.valueOf(currentNumber.substring(index, getDigitExponent(index)));
}

}