Create simplecalc.y

Author: VictorRodriguez

labs/04/calculator_v2_linux_zoo/simplecalc.y

@@ -0,0 +1,28 @@
+%{
+#include <stdio.h>
+int yylex();
+ void yyerror (char const *s) {
+   fprintf (stderr, "%s\n", s);
+ }
+%}
+
+
+%token NAME NUMBER
+%%
+
+statement: NAME '=' expression          {printf("%c = %d\n", $1,$3);}
+ | expression                                           {printf("= %d\n", $1);}
+ ;
+expression: expression '+' NUMBER   { $$ = $1 + $3;}
+ | expression '-' NUMBER            { $$ = $1 - $3;}
+ | expression '*' NUMBER            { $$ = $1 * $3;}
+ | '(' expression ')'                           {$$ = $2;}
+ | NUMBER                           {$$ = $1;}
+ ;
+
+%%
+
+int main(){
+        yyparse();
+        return 0;
+}