$**$please make sure to have $3$ seperate files. one of them is the lex, one is yacc, and the other is the main program. please attach commands of ubuntu with each step. The requirements for the compiler are as follows:

each student is required to implement a compiler for a small

subset of high$-$level language such as Java or C$.$ The compiler itself must be written

in lex$/$flex and must perform$/$execute the following:

$$ Basic binary operations $(+,-,*,/,...$etc$).$

$$ Basic relational operations $(>,<,>=,<=,...$etc$).$

$$ Basic logical operations $($&&$,||,$ not, $...$etc$).$

$$ Selection statements $($if$,$ switch, $...$etc.$)$

$$ Repetition $($loop$)$ statements $($for$,$ while, $...$etc$).$

$$ Structures $($arrays$,$ array$-$lists, sets, maps, $...$etc.$)$

$$ Different data types $($int$,$ string, char, $...$etc.$).$