funguje

du6/program.c

@@ -70,6 +70,7 @@ void run_knowledge_system(struct tree* node) {
         char answer[10];
         if (fgets(answer, sizeof(answer), stdin) == NULL) {
             printf("Koniec vstupu\n");
+	    exit(0);
             return;
         }
         if (answer[0] == 'a') {
@@ -78,6 +79,7 @@ void run_knowledge_system(struct tree* node) {
             run_knowledge_system(node->right);
         } else {
             printf("Nerozumiem\n");
+	    exit(0);
             return;
         }
     }