create a simple calculator with flex




File list:
teme
...\ivona
...\.....\t2.l
...\.....\t2.txt
...\.....\t2.y
...\lfa3
...\....\lfa3.rar
...\....\val.l
...\....\val.y
...\LFAC Labs
...\.........\L1
...\.........\..\in.txt
...\.........\..\l1
...\.........\..\l1.l
...\.........\..\lex.yy.c
...\.........\..\out.txt
...\.........\L2
...\.........\..\input.c
...\.........\..\l2
...\.........\..\l2.l
...\.........\..\lex.yy.c
...\.........\..\output.html
...\.........\L3
...\.........\..\cod.dat
...\.........\..\lbj.txt
...\.........\..\lex.yy.c
...\.........\..\t3
...\.........\..\t3.l
...\.........\..\t3.y
...\.........\..\y.tab.c
...\.........\..\y.tab.h
...\.........\L4
...\.........\..\lex.yy.c
...\.........\..\string
...\.........\..\T4.l
...\.........\..\T4.y
...\.........\..\y.tab.c
...\.........\..\y.tab.h
...\file.txt
...\lex.yy.c
...\output1.txt
...\output2.txt
...\T4.l
...\T4.y
...\tema1
...\tema1.l