1)What is the grammar accepted by these two interpreters? Write as EBNF form

2)How can the bison program evaluate the input, e.g., print out the result

Note: both take in 0-9, +, -, /, *, but does not take negative numbers .

a)

b)

[02/12/19]seed@VM$ cd cps352s19/labs/labl/calcl [02/12/19] seed@VM:-/.../calcl$ ls build calcl.l calcl.y [02/12/19] seed@VM:-1.../calcl$ ./build calcl.y: warning: 4 shift/reduce conflicts [-Wconflicts-sr] [02/12/19]seed@VM:-/.../calcl$ ls build calc1. ex . yy . .tab . .tab.o calcl calci.y lex.yy.o y.tab.h [02/12/19]seed@VM:-/.../calc1$ ./calcl 1+3-2 2 6-3-2 syntax error [02/12/19]seed@vM:-/.../calc1$ I 300 *calco.l (/cps352s19/labs/lab1) gedit )1:40AM Terminal [02/12/19]seed@VM:-/.../calc2$ ls build calc2.1 cale2.y [02/12/19]seed@VM:-/.../calc2$ build [02/12/19] seed@VM:-/.../calc2$ ls build calc2 calc2.y lex.yy.o y.tab.h [02/12/19]seed@VM:-/.../calc2$ ./calc2 S calc2.1 . yy . .tab . .tab.o a=10 a+i 15 b-a-i Lex Tab Width: 8 Ln27, Col2 INS