Plz have a look on this code why not printitng output?

#1
#2

@Ashu1318 you have to solve the sudoku for that number only if that digit can be placed at that place. S0everything should go inside that if condition.
image

code:

#3

why can’t we pass the board by refrences in functions??

#4

@Ashu1318
its an array, arrays are automatically sent by reference only