#include<stdio.h>

#include<stdlib.h>

#include<string.h>

#include "task1.h"

FILE *fp;

FILE *fp_read;

#include "task2.c"

extern FILE* yyin;

int yylex(void);

{

struct tnode* node;

};

%token START END NUM ASSIGN READ WRITE ID PLUS MINUS MUL DIV

%type<node> program SLIST stmt asgStmt inputStmt outputStmt expr START END NUM ASSIGN READ WRITE ID PLUS MINUS MUL DIV

%left PLUS MINUS

%left MUL DIV

program : START SLIST END {GenerateCode($2); Interpret($2);}

| START END {}

;

SLIST : stmt {$$ = $1;}

| SLIST stmt {$$ = createTree(0,connector_node,NULL,$1,$2);}

;

stmt : asgStmt {$$ = $1;}

| inputStmt {$$ = $1;}

| outputStmt {$$ = $1;}

;

asgStmt : ASSIGN expr ';' {$$ = createTree(0,assign_node,NULL,$1,$2);};

inputStmt : READ '(' ID ')' ';' {$$ = createTree(0,read_node,NULL,$3,NULL);};

outputStmt : WRITE '(' expr ')' ';' {$$ = createTree(0,write_node,NULL,$3,NULL);};

expr : expr PLUS expr {$$ = createTree(0,plus_node,NULL,$1,$3);}

| expr MINUS expr {$$ = createTree(0,minus_node,NULL,$1,$3);}

| expr MUL expr {$$ = createTree(0,mul_node,NULL,$1,$3);}

| expr DIV expr {$$ = createTree(0,div_node,NULL,$1,$3);}

| '(' expr ')' {$$ = $2;}

| ID {$$ = $1;}

| NUM {$$ = $1;}

;

void yyerror(char *S)

{

printf("\n%s",S);

}

int main()

{

fp = fopen("/home/shrey/xsm_expl/xsm_progs/task2.xsm","w");

fp_read = fopen("input.txt","r");

yyin = fp_read;

yyparse();

return 0;

}