虽然比较水 =。= 但是写了两节课+一个中午 都是强迫症的锅
#include#include #include using namespace std;class student // student 类为管理系统的一个节点{ friend class studentMessage; student *next; char name[30]; char num[30]; double score[6];public: student() { strcpy(name, "null"); strcpy(num, "null"); for (int i = 0; i < 6; ++i) score[i] = 0; } student(const student &a) { strcpy(name, a.name); strcpy(num, a.num); for (int i = 0; i < 6; ++i) score[i] = a.score[i]; } student &input() { cout << "姓名："; cin >> name; cout << "学号："; cin >> num; for (int i = 0; i < 5; ++i) { cout << "输入第" << (i + 1) << "门成绩:"; cin >> score[i]; score[5] += score[i]; } return *this; } student* get_next() { return next; } void print() { printf("%8s %10s ", name, num); for (int i = 0; i < 6; ++i) printf(" %6.2f ", score[i]); printf("\n"); } void Swap() // 交换当前结点和下一个 { char temp[30]; strcpy(temp, name); strcpy(name, next->name); strcpy(next->name, temp); strcpy(temp, num); strcpy(num, next->num); strcpy(next->num, temp); for (int i = 0; i < 6; ++i) { int tmp = score[i]; score[i] = next->score[i]; next->score[i] = tmp; } }};class studentMessage{protected: student *first; student *last;public: studentMessage() { first = last = new student; } ~studentMessage() { Clear(); delete first; } studentMessage &Append(); // 在链表尾部插入节点 student *Find(const char *x); // 查找 void Query(); // 查询 studentMessage &Delete(); // 删除查找结点 studentMessage &Clear(); // 删除所有结点 studentMessage &Sort(); // 按第i门课排序 void print(); // 显示所有节点 int menu(); // 显示菜单};studentMessage &studentMessage::Append(){ student x; x.input(); student *ptr = last; *ptr = x; last = new student; ptr->next = last; return *this;}studentMessage &studentMessage::Delete(){ char x[30]; cout << "输入要删除的信息（学号或姓名）\n"; cin >> x; student *ptr = Find(x); if (ptr == last) { cout << "未找到相关信息\n"; return *this; } ptr->print(); cout << "是否删除此信息？（是输入1，否输入0）"; cin >> x; if (*x == '1') { if (ptr == first) { first = first->next; delete first; } else { student *temp = first; while (temp->next != ptr) temp = temp->next; temp->next = ptr->next; delete ptr; } cout << "已删除\n"; } else { cout << "已取消\n"; } return *this;}studentMessage &studentMessage::Clear(){ char ch[30]; cout << "将删除所有信息。确认请按Y"; cin >> ch; if (*ch != 'Y' && *ch != 'y') { cout << "已取消\n"; return *this; } student *ptr = first; while (ptr != last) { student *next = ptr->next; delete ptr; ptr = next; } first = last; return *this;}void studentMessage::print(){ if (first == last) { cout << "暂无信息\n"; return ; } cout << "---------------------------------成绩列表------------------------------" << endl; cout << "序号 姓名 学号 成绩1 成绩2 成绩3 成绩4 成绩5 总成绩" << endl; int no = 1; student *ptr = first; while (ptr != last) { printf("%3d:", no++); ptr->print(); ptr = ptr->next; }}student *studentMessage::Find(const char *x){ student *ptr = first; while (ptr != last) { if (strcmp(ptr->name, x) == 0 || strcmp(ptr->num, x) == 0) break; ptr = ptr->next; } return ptr;}void studentMessage::Query(){ char x[30]; cout << "输入你要查询的信息(学号或姓名)"; cin >> x; student *ptr = Find(x); if (ptr == last) { cout << "没有查询到相关信息\n"; } else { ptr->print(); }}// 冒泡排序studentMessage &studentMessage::Sort(){ int x; cout << "输入你想按照哪门课的成绩来排序?((1-5)总成绩输入6):"; cin >> x; x--; student *ptr, *cnt = last; while (cnt != first) { ptr = first; while (ptr->next != cnt) { if (ptr->next->score[x] > ptr->score[x]) { ptr->Swap(); } ptr = ptr->next; } cnt = ptr; } return *this;}int studentMessage::menu(){ cout << "===============================\n"; cout << " 学生成绩管理系统\n\n"; cout << " 1.显示所有学生成绩\n"; cout << " 2.添加信息\n"; cout << " 3.查询信息\n"; cout << " 4.删除信息\n"; cout << " 5.成绩排序\n"; cout << " 6.删除所有信息\n"; cout << " 0.退出\n"; cout << "===============================\n"; int ch; cin >> ch; return ch;}int main(){ studentMessage ls; int ch; while (ch = ls.menu()) { switch(ch) { case 1: ls.print(); break; case 2: ls.Append(); break; case 3: ls.Query(); break; case 4: ls.Delete(); break; case 5: ls.Sort(); break; case 6: ls.Clear(); break; } } return 0;}