电话簿采用双链表

问题是程序在第一个选择下运行良好但它开始重复而不要求选择并进入addNode或SearchNode函数

list *newList = new list;
int choice = 0;
while (choice != 3)
{
    printf("What would you like to do?n");
    printf("1 - Insert something in the phonebook?n");
    printf("2 - Search something from the phonebook?n");
    printf("3 - Nothing at alln");
    printf("Enter 1 through 5: ");
    scanf_s("%d", &choice);

    switch (choice) {
    case 1:
        newList->addNode();
        break;
    case 2:
        newList->searchNode();
        break;
    default:
        printf("nThank you for using the phonebookn");
    }
    choice = 0;
}