Authors:
Stuart Reges, Marty Stepp
Chapter:
Program Logic And Indefinite Loops
Exercise:
Exercises
Question:14 | ISBN:9780136091813 | Edition: 2
Question
Write a method named numUnique that takes three integers as parameters and returns the number of unique integers among the three. For example, the call numUnique(18, 3, 4) should return 3 because the parameters have three different values. By contrast, the call numUnique(6, 7, 6) should return 2 because there are only two unique numbers among the three parameters: 6 and 7.
Answer
// package indefinite_loops;
public class UniqueNumber {
public static int numUnique(int a, int b, int c) {
int[] arr = new int[3];
arr[0] = a;
arr[1] = b;
arr[2] = c;
// loop over the elements by taking j as initial index and k as next index
int uniques = 0;
for (int j = 0; j < arr.length; j++) {
for (int k = j + 1; k < arr.length; k++) {
// if values in index j and index k are same we change default value to be
// false;
if (k != j && arr[k] != arr[j])
uniques++;
}
}
return uniques;
}
public static void main(String args[]) {
System.out.println("number of unique values are: " + numUnique(4, 4, 8));
}
}
Output:
number of unique values are: 2