Generate three address code for following code,

While (a-b)     do
If (cod)    then
x=y+2 
else
x=y-2

Recursive decent parsing

• Recursive descent is a top-down parsing technique that constructs the parse tree from the top and the input is read from left to right.
• It uses procedures for every terminal and non-terminal entity.
• This parsing technique recursively parses the input to make a parse tree, which may …