printf("|添加书籍|\n"); cout << "请输入ID:"; cin >> book_id; cout << "请输入书名:"; cin >> name; cout << "请输入数量:"; cin >> number; cout << "请输入价格:"; cin >> price; cout << "请输入作者:"; cin >> author; cout << "请输入类型:"; cin >> type; cout << "当前信息为---id=" << book_id << ",书名=" << name << ",数量=" << number << ",价格=" << price << ",作者=" << author << "类型=" << type << endl; sql = "insert into books values(" + to_string(book_id) + ",'《" + name + "》'," + to_string(number) + "," + to_string(price) + ",'" + author + "','" + type + "')"; int ret = mysql_query(&mysql, sql.c_str()); if (ret) { cout << "Error: Query[添加失败] fail." << endl; break; }详细解释下上方代码

#include <iostream> #include <string> class Person { protected: std::string name; int age; std::string addr; public: void get_value() { std::cout << "请输入姓名："; std::cin >> name; std::cout << "请输入年龄："; std::cin >> age; std::cout << "请输入地址："; std::cin >> addr; } }; class Teacher : public Person { public: void display() { std::cout << "姓名：" << name << std::endl; std::cout << "年龄：" << age << std::endl; std::cout << "地址：" << addr << std::endl; std::cout << "我是教师" << std::endl; } }; class Student : public Person { public: void display() { std::cout << "姓名：" << name << std::endl; std::cout << "年龄：" << age << std::endl; std::cout << "地址：" << addr << std::endl; std::cout << "我是学生" << std::endl; } }; int main() { Teacher t; Student s; s.get_value(); t = s; t.display(); return 0; }并重载operator=

std::cout << "请输入姓名："; std::cin >> name; std::cout << "请输入年龄："; std::cin >> age; std::cout << "请输入地址："; std::cin >> addr; } }; class Teacher : public Person { public: void ...

int main() { int choice; do { cout << "1.增加人员信息" << endl; cout << "2.删除人员信息" << endl; cout << "3.修改人员信息" << endl; cout << "4.查找人员信息" << endl; cout << "5.保存人员信息" << endl; cout << "6.读取人员信息" << endl; cout << "0.退出系统" << endl; cout << "请输入你的choice" << endl; cin >> choice; switch (choice) { switch (choice) { case 1: { string id, name, dept, grade, group, pos; cout << "Enter student ID: "; cin >> id; cout << "Enter name: "; cin >> name; cout << "Enter department: "; cin >> dept; cout << "Enter grade: "; cin >> grade; cout << "Enter group: "; cin >> group; cout << "Enter position: "; cin >> pos; Member member(id, name, dept, grade, group, pos); team.addMember(member); cout << "Member added successfully." << endl; break; } case 2: { string id; cout << "Enter student ID to delete: "; cin >> id; team.deleteMember(id); cout << "Member deleted successfully." << endl; break; } case 3: { string id, group, position; cout << "Enter student ID to modify: "; cin >> id; cout << "Enter new group: "; cin >> group; cout << "Enter new position: "; cin >> position; team.modifyMember(id, group, position); cout << "Member modified successfully." << endl; break; } case 4: team.displayMembers(); break; case 5: team.saveToFile(); break; case 0: cout << "Exiting program." << endl; break; default: cout << "Invalid choice. Please try again." << endl; break; } } while (choice != 0); return 0; } 这段代码错误该怎么改

cout << "请输入你的choice: "; cin >> choice; switch (choice) { case 1: { string id, name, dept, grade, group, pos; cout << "Enter student ID: "; cin >> id; cout << "Enter name: "; cin >> ...

std::cout << "请输入年份: "; std::cin >> year; 为什么要这样表示，c++还能怎样表达这个意思

std::cout << "请输入年份: "; 是用于在控制台输出提示信息，提示用户输入年份。而 std::cin >> year; 则是用于从用户输入中获取年份的值，并将其存储在变量 year 中。这种方式是 C++ 的标准输入输出流...

请你说出void add(Student* head) { Student* p = head; while (p->next != NULL) { p = p->next; } Student* newStudent = new Student; cout << "请输入学生信息：\n"; cout << "学号："; cin >> newStudent->id; cout << "姓名："; cin >> newStudent->name; cout << "年龄："; cin >> newStudent->age; cout << "性别："; cin >> newStudent->gender; cout << "成绩："; cin >> newStudent->score; newStudent->next = NULL; p->next = newStudent; cout << "学生信息添加成功！\n"; }的运行逻辑

函数的输入参数是一个指向链表头节点的指针 head，函数的作用是在链表的尾部添加一个新的学生信息。函数首先定义了两个指针，p 和 newStudent，其中 p 被初始化为 head，newStudent 是一个新的学生信息节点。然后...

请你说出void modify(Student* head) { int id; cout << "请输入要修改的学生学号："; cin >> id; Student* p = head->next; while (p != NULL) { if (p->id == id) { cout << "请输入修改后的学生信息：\n"; cout << "姓名："; cin >> p->name; cout << "年龄："; cin >> p->age; cout << "性别："; cin >> p->gender; cout << "成绩："; cin >> p->score; cout << "学生信息修改成功！\n"; return; } p = p->next; } cout << "未找到该学生的信息！\n"; }的运行逻辑

函数首先从控制台输入要修改的学生学号 id。然后定义一个指针 p，并将其初始化为链表头节点的 next 指针，即第一个学生信息节点。接下来，使用 while 循环遍历整个链表，查找学号等于 id 的学生信息节点。如果找到...

改进以下代码：void addMedicine() { int count; cout << "请输入要增加的药品个数："; cin >> count; for (int i = 0; i < count; i++) { Medicine medicine; cout << "请输入药品编号："; cin >> medicine.id; if (findMedicineById(medicine.id) != -1) { cout << "该编号已存在，请重新输入！" << endl; i--; continue; } cout << "请输入药品名称："; cin >> medicine.name; cout << "请输入生产厂家："; cin >> medicine.manufacturer; cout << "请输入定价："; cin >> medicine.price; cout << "请输入生产日期（格式：yyyy-mm-dd）："; cin >> medicine.productionDate; cout << "请输入药品功效："; cin >> medicine.efficacy; medicines[medicineCount++] = medicine; } saveMedicines(); cout << "添加成功！" << endl; }

cout << "请输入要增加的药品个数："; cin >> count; for (int i = 0; i < count; i++) { Medicine medicine; bool isExist; do { isExist = false; cout << "请输入药品编号："; cin >> medicine.id; for...

void modifyStudent() { string idToModify; cout << "请输入要修改的学生的学号："; cin >> idToModify; bool found = false; for (int i = 0; i < numStudents; i++) { if (students[i].id == idToModify) { found = true; cout << "请输入修改后的信息：\n"; cout << "姓名："; cin >> students[i].name; cout << "高等数学成绩："; cin >> students[i].scores[0]; cout << "英语成绩："; cin >> students[i].scores[1]; cout << "物理成绩："; cin >> students[i].scores[2]; 解释这段代码

首先，代码提示用户输入要修改的学生的学号，将其存储在字符串变量idToModify中。接下来，代码通过一个循环遍历学生记录中的学生信息，查找与idToModify相同的学生。如果找到了相应学生，则将found标记为true，...

class TWorker { public: void set_worker()//输入职工信息 { cout<<"请输入职工编号:"; cin>>number; cout<<"请输入职工姓名:"; cin>>name; } protected: char name[18],number[18]; }; class TSalary { public: void set_salary()//输入工资数 { cout<<"请输入所得基本工资:"; cin>>BSalary; cout<<"请输入所得职务工资:"; cin>>ZSalary; cout<<"请输入所得津贴:"; cin>>bonus; cout<<"请输入医疗保险:"; cin>>Medical_insurance; cout<<"请输入公积金:"; cin>>fund; }

TWorker类中有一个公共的函数set_worker()，用于输入职工的编号和姓名。TSalary类中也有一个公共的函数set_salary()，用于输入职工的工资信息，包括基本工资、职务工资、津贴、医疗保险和公积金。需要注意的是，...

修改这个程序的错误#include <iostream>#include <fstream>#include <string>int main() { std::string source_file_name, target_file_name; std::cout << "请输入源文件名："; std::cin >> source_file_name; std::cout << "请输入目标文件名："; std::cin >> target_file_name; std::ifstream source_file(source_file_name, std::ios::binary); std::ofstream target_file(target_file_name, std::ios::binary); if (!source_file || !target_file) { std::cerr << "文件打开失败" << std::endl; return 1; } target_file << source_file.rdbuf(); std::cout << "文件复制成功" << std::endl; return 0;}

std::cout << "请输入源文件名："; std::cin >> source_file_name; std::cout << "请输入目标文件名："; std::cin >> target_file_name; std::ifstream source_file(source_file_name, std::ios::in | std::...

#include<iostream> #include<iomanip> using namespace std; int main() { int x,y,z; cout<<"输入年："; cin>>x; cout<<"输入月："; cin>>y; cout<<"输入日："; cin>>z; int a[12]={31,28,31,30,31,30,31,31,30,31,30,31}; if(((x%4)==0&&(x%100)!=0)||x%40

具体来说，它首先让用户输入一个日期，包括年、月、日，然后使用if-else语句来判断日期是否为该月的最后一天，或者是否为12月31日。如果是最后一天，则将月份加1，日期置为1；如果是12月31日，则将年份加1，月份和...

以下这段代码该怎么优化int main() { int v1=0, v2=0; std::cout << "请输入两个整数:" << std::endl; std::cout << "第一个整数:"; std::cin >> v1; std::cout << "第二个整数"; std::cin >> v2; if (v1 > v2) { int tmp = 0; tmp += v1; v1 = v2; v2 = tmp; } for (int i=v1;i <= v2;++v1) { std::cout << v1 <<std::endl; } return 0; }

std::cout << "请输入两个整数:" << std::endl; std::cout << "第一个整数:"; std::cin >> v1; std::cout << "第二个整数:"; std::cin >> v2; if (v1 > v2) { int tmp = v1; v1 = v2; v2 = tmp; } for ...

list<Book>lst; class Bookstore { private: list<Book> books; public: void WarehousingBook() {//入库书籍 cout << "请输入书名："; string name; cin >> name; cout << "请输入作者："; string author; cin >> author; cout << "请输入出版社："; string publisher; cin >> publisher; cout << "请输入页数："; int pages; cin >> pages; cout << "请输入最新入库时间（格式：年月日）："; int year, month, day; cin >> year >> month >> day; Time latestTime(year, month, day); cout << "请输入进货数量："; int stock; cin >> stock; cout << "请输入价格："; double price; cin >> price; list<Book>::iterator it; for (it = lst.begin(); it != lst.end(); it++){ if (it->name == name && it->author == author) { it->stock += stock; cout << "该书库里存在该书，入库成功！" << endl; return; } } Book b(name, author, publisher, pages, latestTime, stock, price); books.push_back(b); cout << "该书库里未存在该书，入库成功！" << endl; } 为什么实现不了

cout << "请输入书名："; string name; cin >> name; cout << "请输入作者："; string author; cin >> author; cout << "请输入出版社："; string publisher; cin >> publisher; cout << "请输入页数："; ...

完善 int a,b; vector<_0843杨晓慧>::iterator p=i.v.begin(); cout<<"学号按1，姓名请按2."; cin>>a; if(a==1){cout<<"输入学号："; } if(a==2){cout<<"输入要姓名：";} cin >> b; if(b==p->num[N]||b==p->name){cout<< setiosflags(ios::left)<<setw(12)<num[N]<<setw(

cout << setiosflags(ios::left) << setw(12) << p->num[0] << setw(12) << p->name << setw(8) << p->score[0] << setw(8) << p->score[1] << setw(8) << p->score[2] << setw(8) << p->score[3] << endl;...

改写以下程序。要求定义类student，封装三个数据成员和两个成员函数intpt和output，使程序得到相同的运行效果。 #include <iostream> using namespace std; struct student { char name[20]; unsigned int id; double score; }; void input(student &stu) { cout<<"name?"; cin>>stu.name; cout<<"id?"; cin>>stu.id; cout<<"score?"; cin>>stu.score; } void output(student &stu) { cout<<"name: "<<stu.name<<"\tid: "<<stu.id<<"\tscore: "<<stu.score<<endl; } int main() { student s={"\0", 0, 0}; input(s); output(s); }

cout << "name: " << name << "\tid: " << id << "\tscore: " << score << endl; } }; int main() { Student s; s.input(); s.output(); return 0; } 这个程序定义了一个名为 Student 的类，封装了三个...

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#include<iostream> #include<iomanip> using namespace std; int main() { int x,y,z; cout<<"输入年："; cin>>x; cout<<"输入月："; cin>>y; cout<<"输入日："; cin>>z; int a[12]={31,28,31,30,31,30,31,31,30,31,30,31}; if(((x%4)==0&&(x%100)!=0)||x%40

完善 int a,b; vector<_0843杨晓慧>::iterator p=i.v.begin(); cout<<"学号按1，姓名请按2."; cin>>a; if(a==1){cout<<"输入学号："; } if(a==2){cout<<"输入要姓名：";} cin >> b; if(b==p->num[N]||b==p->name){cout<< setiosflags(ios::left)<<setw(12)<num[N]<<setw(

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