Java – bad operand type of binary operator ‘^’

Try to create a recursive method to promote a double value to the int permission of the java course The instruction says, "however, write code so that when n is an even number, the method will return (x ^ (n / 2)) ^ 2."

This is what I have done so far:

public static double powerFaster(double x,int n) {
         if (n == 0) {
            return 1;
         } 
         else if ((n % 2) == 0) {
           return ((x ^ (n / 2.0) ^ 2.0));  //Error occurs here.
         } else {
           return x * powerFaster(x,(n - 1));
         }
     }

Solution

^Is an XOR operator, not a power Using math Pow () to get power

In other words, I think you missed the point of the exercise

You should return powerfast (x, N / 2) * powerfast (x, N / 2); When n is even (actually a recursive call is made, the result is stored in a variable and multiplied by itself)

public static double powerFaster(double x,int n) {
     if (n == 0) {
        return 1;
     } 
     else if ((n % 2) == 0) {
       double pow = powerFaster(x,n/2);
       return pow * pow;
     } else {
       return x * powerFaster(x,(n - 1));
     }
 }