c++设计一个公司人事管理系统

这个问题需要一个全面的解决方案。下面是一个简单的思路：

1. 首先确定需要管理的员工信息，如姓名、性别、年龄、职位、入职时间、联系方式等等。这些信息可以通过一个结构体或者类来表示。
2. 然后确定需要进行的管理操作，比如添加员工、删除员工、修改员工信息、查找员工信息等等。这些操作可以通过函数来实现。
3. 在设计系统时，需要考虑到数据的存储和管理。可以使用文件或者数据库来存储和管理员工信息。
4. 在设计系统时，需要考虑到用户界面的设计。可以使用命令行界面或者图形界面来实现用户与程序的交互。

下面是一个简单的代码示例：

#include <iostream>
#include <fstream>
#include <string>

using namespace std;

// 员工信息结构体
struct Employee {
    string name;
    string gender;
    int age;
    string position;
    string hireDate;
    string contact;
};

// 添加员工信息
void addEmployee(Employee emp) {
    ofstream fout("employee.txt", ios::app);
    fout << emp.name << " " << emp.gender << " " << emp.age << " " << emp.position << " " << emp.hireDate << " " << emp.contact << endl;
    fout.close();
    cout << "Add employee success!" << endl;
}

// 删除员工信息
void deleteEmployee(string name) {
    ifstream fin("employee.txt");
    ofstream fout("temp.txt");
    Employee emp;
    bool found = false;
    while (fin >> emp.name >> emp.gender >> emp.age >> emp.position >> emp.hireDate >> emp.contact) {
        if (emp.name != name) {
            fout << emp.name << " " << emp.gender << " " << emp.age << " " << emp.position << " " << emp.hireDate << " " << emp.contact << endl;
        } else {
            found = true;
        }
    }
    fin.close();
    fout.close();
    remove("employee.txt");
    rename("temp.txt", "employee.txt");
    if (found) {
        cout << "Delete employee success!" << endl;
    } else {
        cout << "Employee not found!" << endl;
    }
}

// 修改员工信息
void modifyEmployee(string name, Employee emp) {
    ifstream fin("employee.txt");
    ofstream fout("temp.txt");
    Employee empRead;
    bool found = false;
    while (fin >> empRead.name >> empRead.gender >> empRead.age >> empRead.position >> empRead.hireDate >> empRead.contact) {
        if (empRead.name != name) {
            fout << empRead.name << " " << empRead.gender << " " << empRead.age << " " << empRead.position << " " << empRead.hireDate << " " << empRead.contact << endl;
        } else {
            fout << emp.name << " " << emp.gender << " " << emp.age << " " << emp.position << " " << emp.hireDate << " " << emp.contact << endl;
            found = true;
        }
    }
    fin.close();
    fout.close();
    remove("employee.txt");
    rename("temp.txt", "employee.txt");
    if (found) {
        cout << "Modify employee success!" << endl;
    } else {
        cout << "Employee not found!" << endl;
    }
}

// 查找员工信息
void searchEmployee(string name) {
    ifstream fin("employee.txt");
    Employee emp;
    bool found = false;
    while (fin >> emp.name >> emp.gender >> emp.age >> emp.position >> emp.hireDate >> emp.contact) {
        if (emp.name == name) {
            cout << "Name: " << emp.name << endl;
            cout << "Gender: " << emp.gender << endl;
            cout << "Age: " << emp.age << endl;
            cout << "Position: " << emp.position << endl;
            cout << "Hire Date: " << emp.hireDate << endl;
            cout << "Contact: " << emp.contact << endl;
            found = true;
            break;
        }
    }
    fin.close();
    if (!found) {
        cout << "Employee not found!" << endl;
    }
}

int main() {
    // 添加员工信息
    Employee emp1 = {"Tom", "Male", 30, "Manager", "2020-01-01", "1234567890"};
    addEmployee(emp1);

    // 删除员工信息
    deleteEmployee("Tom");

    // 修改员工信息
    Employee emp2 = {"Jerry", "Male", 25, "Engineer", "2021-01-01", "0987654321"};
    modifyEmployee("Jerry", emp2);

    // 查找员工信息
    searchEmployee("Jerry");

    return 0;
}

在此代码示例中，我们使用文件来存储和管理员工信息。在实际应用中，可能需要使用数据库来存储和管理更大量的员工信息。