How to find out the number of all squares in a number?

Question

C++ / C#

It is necessary to write a program that will find the number of all odd numbers that are a square in a number.
For example 149 consists of 1^2, 7^2, 3^2 = number is 3.
How to do this in c++?

Answer 1

These are all odd numbers from digits 1,4,9
The function is called mutations
I think in 5 minutes you will find a lot of implementations