在单链表里查找最喜爱的图书，有一个比较的语句，这是我图书信息的结构体

struct information {
    char booknum[20];
    char bookname[20];
    float price = 0.0f;
};

功能函数

void favorite(Linklist &L, int *num, int *sum0) {
    Linklist p, ptr = 0;
    int t = 0, n = *num, sum = *sum0, i = 0, k = 0;
    char string[10][60] = { 0,0 };
    cout << "请输入最爱图书" << endl;
    for (; sum > 0; sum--) {
        cin >> string[t];
        t++;
    }
    i = 0;
    for (; *sum0 > 0; (*sum0)--) {
        k = 0;
        p = L->next;
        while (p->data.price != 0) {
            if (!strcmp(string[i],p->data.bookname)) {
                cout <<" "<< p->data.booknum <<" "<< p->data.bookname <<" "<< p->data.price << endl;
                p = p->next;
                k++;
                i++;
                break;
            }
            p = p->next;
        }
        if (k == 0) {
            cout << "抱歉，没有你最喜爱的图书" << endl;
            i++;
        }
    }

}

比较语句if (!strcmp(string[i],p->data.bookname))改成if (string[i]==p->data.bookname)就一直跳过，为啥啊？？？？