Super Power

You are building a system to find super power of a given number. Given two integers, N and P, super power is the sum of the P-th powers of every digit in N. For eg: if N =1453 and P =2 then super power = $1^2 + 4^2 + 5^2 + 3^2 = 51$. If either N or P is negative, then you should output "Super Power is only of Positive Numbers". Also, if both P and N are zero, then you should output "Zero cant