diff --git a/cv3/program.c b/cv3/program.c
index ec25fd9..499e767 100644
--- a/cv3/program.c
+++ b/cv3/program.c
@@ -21,11 +21,11 @@ int main() {
     while (fgets(line, LINESIZE, stdin)) {
         velkost = strlen(line);
         if (velkost == 1 && line[velkost - 1] == '\n') {
-            printf("no input\n");
+
             break;
         }
         if (input >= 10){
-            printf("no input\n");
+
             break;
         }
         if (line[0] == '+' || line[0] == '-' || line[0] == '*' || line[0] == '/') {
@@ -43,9 +43,14 @@ int main() {
                 a--;
             }
             if (line[0] == '/') {
-                number[a - 2].cislo = number[a - 2].cislo / number[a - 1].cislo;
-                a--;
-            }
+                if (number[a - 1].cislo == 0){
+                    printf("division by zero");
+                }
+                else {
+                    number[a - 2].cislo = number[a - 2].cislo / number[a - 1].cislo;
+                    a--;
+                }
+                }
         }
         else {
             p = atof(line);