Let us learn how to find first and follow of a grammar in C programming. There are two different C programs to find first and follow of non-terminals in a given grammar.
The first of a grammar can be written using structures as well. Here, we have used array data structure to calculate first and follow in C programming.
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What is First and Follow?
The first and follow sets are used in compiler designing process. The first set is used in LL parsers which are top – down parsers that read or interpret from left to right.
The follow set is used in LR parsers which are bottom-up parsers that read or interpret from right to left.
The LL parsers use leftmost derivations whereas the LR parsers use rightmost derivations. A predictive parser is constructed using first and follow sets that are associated with Grammar G.
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Note: This C program to find First and Follow sets of a Grammar using Array is compiled with GNU GCC compiler and developed using gEdit Editor in Linux Ubuntu operating system.
C Program To Find First of a Given Grammar using Array
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C Program To Find Follow of a Grammar using Array
If you have any compilation error or doubts in this first and follow of a grammar program in C language, let us know about it in the comment section below.