What does this function do? And how do you evaluate it?
How to trace it? How to understand recursive method?
I just can't understand the recursion, and the exam date is coming soon, and I know in order to understand recursion, I must first understand recursion.
But I just can't write a slightly complex recursive method, can anyone help me out using the simplest English words.
public class BalancedStrings {
public static void printBalanced(String prefix, int a, int b) {
if (a > 0)
printBalanced(prefix + "a", a - 1, b);
if (b > 0)
printBalanced(prefix + "b", a, b - 1);
if (a == 0 && b == 0)
System.out.println(prefix);
}
public static void printBalanced(int n) {
if (n % 2 == 0) {
printBalanced("", n / 2, n / 2);
}
}
public static void main(String[] args) {
printBalanced(4);
}
}
