Bull & Cow

Droid generate a N (depends upon level) digit number and User, tries to guess it.
At each turn the User tries a N digit number, and the Droid displays how close it is to the answer by giving:

1)The number of Bulls - digits correct in the right position.
2) The number of Cows - digits correct but in the wrong position.
The User tries to guess the answer in the fewest number of turns.

Rules-
Droid cannot generate number with repeated digits and 0 in it.
Bulls are counted before Cows.

The consist of two modes

Mode 1
User tries to guess the correct answer in fewest turns

Mode 2
User tries to guess the correct answer in fixed number of turns

github link- https://github.com/vraj0703/Bull_N_Cow