Lex-analyzer-and-Syntax-Generator

Lexical Analyzer and Syntax Analysis Generator

In this project, we built lexical analyzer and a syntax analysis for high level language called MINI-L. The lexical analyzer takes as input a MINI-L source code, and output the lexical tokens associated with the program.

The MINI-L language description is described as follows:

1. Integer scalar variables.
2. One-dimensional arrays of integers.
3. Assignment statements.
4. While loops.
5. If-then-else statements.
6. Read and write statements.
7. MINI-L language is case sensitive, all the key words such that if and while, etc are expressed in lower case
8. A valid identifier must begin with a letter, maybe followed by additional letters, digits, or underscore, and cannot end in an underscore

Example 1 - program mytest;

n : integer; i, j, k : integer; x, y, z : integer;

t : array (100) of integer;

beginprogram

read n, i,j,x,y;

if i<j and j<=n and i>=0 then t(i) := i; t(j) := j; k := t(i); t(i) := t(j); t(j) := t(i); else while x > y or false loop k := (1+y - x)*n / 3 + x; x := x - 10; write k; endloop; endif;

write i,j,x,y,t(i),t(j);

endprogram

Output :

Reserved Words Program program If IF then THEN while WHILE