Update 'cv3/program.c'

cv3/program.c

@@ -50,7 +50,7 @@ int operation_insert_result(struct stack_glavny* stack, char operation) {
                 break;
             case '/':
                 if (operand2 == 0) {
-                    //printf("division by zero\n");
+                    printf("division by zero\n");
                     return false;
                 }
                 result = operand1 / operand2;