java幂运算

public class PowerExample {
    public static void main(String[] args) {
        double base = 2.0;
        double exponent = 3.0;
        double result = Math.pow(base, exponent);
        System.out.println(base + " raised to the power of " + exponent + " is " + result);
    }
}

public class PowerExample {
    public static int power(int base, int exponent) {
        int result = 1;
        for (int i = 0; i < exponent; i++) {
            result *= base;
        }
        return result;
    }

    public static void main(String[] args) {
        int base = 2;
        int exponent = 3;
        int result = power(base, exponent);
        System.out.println(base + " raised to the power of " + exponent + " is " + result);
    }
}

public class FastPowerExample {
    public static long fastPower(long base, long exponent) {
        long result = 1;
        while (exponent > 0) {
            if ((exponent & 1) == 1) { // 如果当前指数为奇数
                result *= base;
            }
            base *= base; // 底数平方
            exponent >>= 1; // 指数减半
        }
        return result;
    }

    public static void main(String[] args) {
        long base = 2;
        long exponent = 30;
        long result = fastPower(base, exponent);
        System.out.println(base + " raised to the power of " + exponent + " is " + result);
    }
}