PEREMENNOY PRISVOENO EXPR

analyzers/polynomials/polynomials.l

@@ -9,13 +9,16 @@ char allowed_variable = 0;
 %}
 
 %%
+"print"     { return PRINT; }
+";"         { return SEMICOLON; }
+"="         { return EQUAL; }
 [0-9]+      { 
               init_polynomial(&yylval.poly);
               add_term(&yylval.poly, atoi(yytext), 0);
               return NUMBER; 
             }
 
-[a-zA-Z]    { 
+[a-z]       { 
               // Если переменная еще не задана, запоминаем первую встреченную
               if (allowed_variable == 0) {
                   allowed_variable = yytext[0];
@@ -31,9 +34,13 @@ char allowed_variable = 0;
               return VARIABLE; 
             }
 
+[A-Z]       {
+              return VAR_POLY;
+            }
+
 [-+*^()]    { return yytext[0]; }
 [ \t]       ;
-\n          { return 0; }
+\n          { allowed_variable = 0; }
 .           { printf("unknown: %s\n", yytext); exit(0); }
 %%
 

analyzers/polynomials/polynomials.y

@@ -15,6 +15,7 @@ extern char allowed_variable;
     Polynomial poly;
 }
 
+%token SEMICOLON PRINT VAR_POLY EQUAL
 %token <poly> NUMBER VARIABLE
 %type <poly> expr
 
@@ -25,12 +26,24 @@ extern char allowed_variable;
 
 %%
 input:
-      | input expr { 
+      | input line
+      ;
+
+line: expr SEMICOLON { 
+            sort_polynomial(&$1);
+            free_polynomial(&$1);
+        }
+      | PRINT expr SEMICOLON { 
             printf("Result: ");
             sort_polynomial(&$2);
             print_polynomial(&$2, allowed_variable);
             free_polynomial(&$2);
         }
+      | VAR_POLY EQUAL expr SEMICOLON {
+            printf("PEREMENNOY PRISVOENO EXPR: ");
+            print_polynomial(&$3, allowed_variable);
+            free_polynomial(&$3);
+      }
       ;
 
 expr:    NUMBER         { $$ = $1; }

poly.txt

@@ -1 +1,4 @@
-((3*x^2 - 2*x + 1) * (x^3 - 4*x) + (5*x^4 - x^2)^2) - (x + 1)^4
+2+2;
+Z = 2+2;
+print ((3*z^2 - 2*z + 1) * (z^3 - 4*z) + (5*z^4 - z^2)^2) - (z + 1)^4;
+print (x+2)^2   +1;