if (uslovie == true)
{

    int number;
    char destination[10];
    char time[10];

    printf("Vvedite nomer: ");
    scanf_s("%d", &number);
    printf("n");

    printf("Vvedite punkt: ");
    gets_s(destination);
    printf("n");

    printf("Vvedite vremya: ");
    gets_s(time);
    printf("n");

    system("cls");

    push(&head, number, destination, time);
    printf("Element uspeshno dobavlen!n");
    system("pause");
    break;
}

else
    printf("Sozdaite spisok!n");

system("pause");
break;

void push(avia **head, int number, char *destination, char *time)
{
    avia *tmp = (avia*)malloc(sizeof(avia));
    if (*head == NULL)
    {
        tmp->number = number;
        for (int i = 0; i < 10; i++)
            tmp->destination[i] = destination[i];
        for (int i = 0; i < 10; i++)
            tmp->time[i] = time[i];
        tmp->next = NULL;
        *head = tmp;
    }
    else
    {
        tmp->number = number;
        for (int i = 0; i < 10; i++)
            tmp->destination[i] = destination[i];
        for (int i = 0; i < 10; i++)
            tmp->time[i] = time[i];
        tmp->next = *head;
        *head = tmp;
    }
}