Important Compiler DESIGN AND CONSTRUCTION on C Language

Some important C programs for various subjects of Engineering grads students, which i have implemented during cours.

Input

Each production in separate line no spaces in production, or space will be treated as symbol.

Number of productions? 5
Enter prod 0: A->BCDx
Enter prod 1: B->#
Enter prod 2: C->#
Enter prod 3: D->d
Enter prod 4: D->e

Enter char symbol ? A
first of A is : { # d e }