邓俊辉

Class A class is a user-defined type. https://en.cppreference.com/w/cpp/language/classes Inheritance The capability of a class to derive properties and characteristics from another class is called Inheritance. 一个类从另一个类派生属性和特性的能力称为继承 https://en.cppreference.com/w/cpp/language/derived_class Overload 重载 functions can have the same name but different type of parameters and different number of parameters. Operating overloading allows us to make operators work for user-defined classes 同一作用域中，同名函数的形式参数（指参数的个数、类型或者顺序）不同时，构成函数重载。 应用：操作符重载，为用户定义类型的操作数定制 C++ 运算符 Operator overloading is an example of C++

题目： https://dsa.cs.tsinghua.edu.cn/oj/problem.shtml?id=1143 第一次提交95，居然是case2错了， 仔细检查一下，发现创建链表出错了，没有考虑开始时是空链表的情况，检查完后就ok了。 100分代码如下， #include <cstdio> #include<string.h> using namespace std; struct zuma{ char a; zuma* pre; zuma* next; }*head,*tail,*pos; int reduce(char a1){ if(pos==tail)return 0; zuma *p=pos,*q=pos,*r; int i=0,j=0; while(p->pre&&p->pre->a==a1){p=p->pre;i++;} while(q->next&&q->next->a==a1){q=q->next;j++;} if(i+j>1){ r=p; p=p->pre; q=q->next; p->next=q; q->pre=p; if(p!=head)pos=p; else pos=p->next; while(r!=q){p=r;r=r->next;if(p!=head||p!=tail)delete(p);} return 1; } return 0; }