insert_string

// Вставляем элемент (сдвигая)
void insert_string(char ** name, char ** birthday, char ** city, int i, int j) {
    char * str_name = new char[1];
    char * str_birthday = new char[1];
    char * str_city = new char[1];

    str_name = name[i];
    str_birthday = birthday[i];
    str_city = city[i];

    for (int k = i; j < k; k--) {
        name[k] = name[k-1];
        birthday[k] = birthday[k-1];
        city[k] = city[k-1];
    }

    name[j] = str_name;
    birthday[j] = str_birthday;
    city[j] = str_city;
}