compiler

I need the code in C program :

For this assignment, you will use FLex or Lex for the lexical part of the task and Yacc or Bison for writing a parser for a simple language described as: Consider the CFG that defines a simple expression. E int +E int * E(E) int We want to read expressions and generate codes for this language using the MIPS processor's assembly language, assuming a stack evaluation model. For example, the generated code for the expression 5+7 should be li $a05 sw $a00($sp) addiu $sp$sp4 li $a07 Iw $t14($sp) add $a0t1$a0 addiu \$sp \$sp -4 Your work results in a C program that can take expressions written in the above language and produce the relevant code. For example, for input 5+7, it generates the above MIPS code. You will use FLex to capture the tokens of the language. And Yacc or Bison to parse and generate code for valid expressions