From 015cbbfb9dd7a08355c25b3a3ea93621b2a64c57 Mon Sep 17 00:00:00 2001
From: Akshay <nerdy@peppe.rs>
Date: Fri, 18 Jun 2021 10:00:04 +0530
Subject: yay it works

---
 15/main.l |  4 ++--
 15/main.y | 34 ++++++++++++++++++++++++----------
 2 files changed, 26 insertions(+), 12 deletions(-)

(limited to '15')

diff --git a/15/main.l b/15/main.l
index ffcb97e..1011cdb 100644
--- a/15/main.l
+++ b/15/main.l
@@ -9,12 +9,12 @@ extern int yylval;
     yylval=yytext[0];
     return NUM;
 };
-[a-zA-Z]+? {
+[a-zA-Z_][a-zA-Z0-9]* {
     yylval=yytext[0];
     return IDENT;
 }
 . return yytext[0];
-\n return 0;
+\n return NL;
 %%
 
 int yywrap() {
diff --git a/15/main.y b/15/main.y
index 46075c2..40b7ba2 100644
--- a/15/main.y
+++ b/15/main.y
@@ -6,12 +6,15 @@
 
 void apply(char);
 void load_num(char);
-void load_var(char);
-void store_var(char);
+void load_var(char *);
+void store_var(char *);
 
 int yyerror(char *);
 int yylex();
 int reg_count=0;
+
+char cur_str[100];
+
 struct instruction {
     char op1;
     char op2;
@@ -19,21 +22,32 @@ struct instruction {
 };
 %}
 
-%token IDENT NUM
+%token IDENT NUM NL
 %type expr
 %left '+'
 %left '*''/'
 %left '-'
 %%
 
-statement: IDENT '=' expr ';' { store_var((char)$1); }
+start: statement NL start
+     | NL
+
+statement: IDENT {
+            strcpy(cur_str, yytext);
+         } '=' expr {
+            printf("ST %s, R%d\n", cur_str, reg_count-1);
+         }
          ;
 
 expr: expr '+' expr {apply('+');}
     | expr '-' expr {apply('-');}
     | expr '*' expr {apply('*');}
-    | NUM {load_num((char)$1); $$=(char)$1;}
-    | IDENT {load_var((char)$1); $$=(char)$1;}
+    | NUM {
+        printf("LD R%d, #%c\n", reg_count++, atoi(yytext));
+    }
+    | IDENT {
+        printf("LD R%d, %s\n", reg_count++, yytext);
+    }
     ;
 
 %%
@@ -55,12 +69,12 @@ void load_num(char num) {
     printf("LD R%d, #%c\n", reg_count++, num);
 }
 
-void load_var(char var) {
-    printf("LD R%d, %c\n", reg_count++, var);
+void load_var(char *var) {
+    printf("LD R%d, %s\n", reg_count++, var);
 }
 
-void store_var(char var) {
-    printf("ST %c, R%d\n", var, reg_count-1);
+void store_var(char* var) {
+    printf("ST %s, R%d\n", var, reg_count-1);
 }
 
 int yyerror(char *s) {
-- 
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