how we can solve maze by stacks and/or queues in c programming

I have two assignment for one problem but i maust to solve it with two ways . i must to write program with c programming to traverse mize by recursive and non-recursive function . i solve it by using a recursive function and this my program by using right hand but i don't know how i can solve it by a non-recursive function but when i search on internet i find some people talking about stacks and/or queues can solve it but i don't know any thing about it if you can help me