while e if-else

ast.c

@@ -228,17 +228,20 @@ static void proc(ast_t *root)
 		break;
 
 	case IF:
-		if (right(root) == NULL)
+		
+		if(expr(left(root)))
 		{
-			// TODO
+			evaluate(right(root));
 		}
-		else
-		{
-		if(left(root))
+	
+		break;
+	case ELSE:
+
+		if(!(expr(left(root))))
 		{
-			right(root);
-		}
+			evaluate(right(root));
 		}
+	
 		break;
 
 		default: