Question

this is a java course.

the topic is a recursive topic.

Please, very importantly write the testing program in another file. A file for the program and another file for testing the program.

Thanks in advance

Write a recursive method, vowels, that returns the number of vowels in a string. Also, write a program to test your method. 3.

Answer 1

public class VowelCountRec {
    static int vowels(String s){
        if(s==null || s.length()==0){
            return 0;
        }
        else{
            char ch = s.charAt(0);
            if(ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u' || ch == 'A' || ch == 'E' || ch == 'I' || ch == 'O' || ch == 'U'){
                return 1+vowels(s.substring(1));
            }
            else{
                return vowels(s.substring(1));
            }
        }
    }

    public static void main(String[] args) {
        System.out.println(vowels("qwertyuiq"));
    }
}