Assignment 2

1. This question refers to the definition of integer literals in Java. What are valid integer literals?
   • 123
   • 123L
   • 0123
   • 00123
   • 0x123
   • 123x
   
   
2. Choose three from Questions 2.1 (a) through (e) in the textbook (p.96-97).
   • Comments in C (in perl)
   • Financial quantities (in perl)
   
   
   
3. Explain why the following if statement results in syntax error in C, Java, and C#?

   
      if (x==1) y = 2 else y = 3;
   

   
   
4. Give a CFG for each of the following languages.
   • Strings of 0's and 1's with an equal number of 0's and 1's.
   • Strings of 0's and 1's with an unequal number of 0's and 1's.
   • Context free language over {a,b}: L={aⁿbⁿ}
     • String of a's and b's that begin with a and end with b. (in DCG of Prolog)
     • Strings of 0's and 1's with an equal number of 0's an 1's (in DCG of Prolog)