void Student::selecSub() { //判断是否是选课时间 Time nowTime; time_t t = time(NULL); tm* tt = localtime(&t); nowTime.year = tt->tm_year + 1900; nowTime.month = tt->tm_mon + 1; nowTime.day = tt->tm_mday; readTime1(); int x = diffDay(start, endt); int y = diffDay(start, nowTime); if (x >= y) { Subject* head_sub = new Subject; head_sub->next = NULL; head_sub = readSub(); Subject* a = head_sub->next; //显示可选课程 readShowSub(); int c; cout << "\n 请输入要选择的课程（序号）："; cin >> c; //根据输入的序号定位课程 int i = 1; int flag = 0; while (a) { if (c == i) { flag = 1; break; } if (a->maxNum - a->okNum > 0) i++; a = a->next; } if (flag == 1) { /** 判断是否已选此课，并更新信息 **/ Student* head_st = new Student; head_st->next = NULL; head_st = readStSub(); Student* p; p = new Student; p->head_stSub = new Subject; p->next = NULL; Subject* s; Subject* t; //判断该学生本学期是否已选本课程 int flag1 = 0, flag2 = 1; p = head_st->next; while (p) { if (p->stNo == st.ip.id) { flag1 = 1; s = p->head_stSub->next; t = p->head_stSub; while (s) { if (s->subID == a->subID) { flag2 = 0; break; } t = s; s = s->next; } break; }//if p = p->next; }//while //更新学生-课程文件 if (flag1 == 1 && flag2 == 1) { //将新选课程加入链表 s = new Subject; s->subID = a->subID; s->next = NULL; t= s; writeStSub(head_st); //修改课程信息 a->okNum++; ma.writeSub(head_sub); //更新课程_学生信息 Student* head_st2 = new Student; Student* e = new Student, * r; r = head_st2; r->next = NULL; //读取学生基本信息 ifstream in2("Student.txt"); if (!in2) { cout << "Can't open \"Student.txt\"!"; exit(0); } while (in2 >> e->stNo >> e->name >> e->college >> e->major >> e->clas) { e->next = NULL; r->next = e; r = e; e = new Student; } in2.close(); //将学生信息加入到课程-学生文件 r = head_st2->next; while (r) { if (r->stNo == st.ip.id) break; r = r->next; } string ssss = a->subID + ".txt"; ofstream ou(ssss, ios::app); if (!ou) { cout << "Can't open \"" << ssss << "\"!"; exit(0); } ou << r->stNo << " " << r->name << " " << r->college << " " << r->major << " " << r->clas << endl; ou.close(); cout << "选课成功！"; cout << " *按Enter键返回！*" << endl; }//if else { cout << " 你本学期已选本课程！" << endl; } }//if else { cout << " 输入错误！" << endl; } }//if (x >= y) else cout << "现在不是选课时间！"; }//Student::selecSub()

2个月前