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+1 vote

I am confused in following kinds of Grammar they are;-

1) S - > AB

A -> Ba

B -> Bb

B - > c

2) S - > AB

A -> Ba

B -> Bb

B - > Epsilon

3) S - > AB

A -> Ba

B -> Bb

B - > dollar

what will be the I0 state of these three grammars.

In 1st what will be the look ahead of B -> Bb and B - > c are we need to consider a or a/b.

In 2n what will be the look ahead of B -> Bb and B - > c are we need to consider a or a/epsilon.

In 3rd what will be the look ahead of B -> Bb and B - > c can we consider $ as look ahead symbol.

1) S - > AB

A -> Ba

B -> Bb

B - > c

2) S - > AB

A -> Ba

B -> Bb

B - > Epsilon

3) S - > AB

A -> Ba

B -> Bb

B - > dollar

what will be the I0 state of these three grammars.

In 1st what will be the look ahead of B -> Bb and B - > c are we need to consider a or a/b.

In 2n what will be the look ahead of B -> Bb and B - > c are we need to consider a or a/epsilon.

In 3rd what will be the look ahead of B -> Bb and B - > c can we consider $ as look ahead symbol.

0 votes

The last Case is not required for understanding and you should not write $ in the production. It represents the start of the stack.

**For Concept:**

@Shubhanshu In short, look-ahead of a non-terminal is the same for its every production.

Watch this video: *Timestamp 5:38*

https://www.youtube.com/watch?v=1XD2wk52-Cs&list=PLEbnTDJUr_IcPtUXFy2b1sGRPsLFMghhS&index=16

–1 vote

Looks like your basics are not clear. I recommend to watch this series.

Compiler Design: https://www.youtube.com/playlist?list=PLEbnTDJUr_IcPtUXFy2b1sGRPsLFMghhS

Compiler Design: https://www.youtube.com/playlist?list=PLEbnTDJUr_IcPtUXFy2b1sGRPsLFMghhS

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