Go语言基础总结

package main
 
import (
    "fmt"
)
 
// 定义一个结构体来表示一个员工
type Employee struct {
    ID        int
    FirstName string
    LastName  string
    Salary    int
}
 
// 定义一个接口来表示可以进行员工管理的系统
type EmployeeManager interface {
    AddEmployee(employee Employee)
    RemoveEmployee(id int)
    UpdateEmployeeSalary(id int, newSalary int)
    GetEmployee(id int) Employee
    ListEmployees() []Employee
}
 
// 实现EmployeeManager接口的具体结构体
type BasicManager struct {
    employees map[int]Employee
}
 
// 实现AddEmployee方法
func (manager *BasicManager) AddEmployee(employee Employee) {
    manager.employees[employee.ID] = employee
}
 
// 实现RemoveEmployee方法
func (manager *BasicManager) RemoveEmployee(id int) {
    delete(manager.employees, id)
}
 
// 实现UpdateEmployeeSalary方法
func (manager *BasicManager) UpdateEmployeeSalary(id int, newSalary int) {
    if employee, exists := manager.employees[id]; exists {
        employee.Salary = newSalary
        manager.employees[id] = employee
    }
}
 
// 实现GetEmployee方法
func (manager *BasicManager) GetEmployee(id int) Employee {
    return manager.employees[id]
}
 
// 实现ListEmployees方法
func (manager *BasicManager) ListEmployees() []Employee {
    employees := make([]Employee, len(manager.employees))
    i := 0
    for _, employee := range manager.employees {
        employees[i] = employee
        i++
    }
    return employees
}
 
func main() {
    // 创建一个BasicManager实例
    manager := &BasicManager{
        employees: make(map[int]Employee),
    }
 
    // 添加员工
    manager.AddEmployee(Employee{ID: 1, FirstName: "John", LastName: "Doe", Salary: 50000})
 
    // 获取员工信息
    employee := manager.GetEmployee(1)
    fmt.Printf("Employee ID %d: %v\n", employee.ID, employee)
 
    // 更新员工薪水
    manager.UpdateEmployeeSalary(1, 55000)
    updatedEmployee := manager.GetEmployee(1)
    fmt.Printf("Updated Employee ID %d: %v\n", updatedEmployee.ID, updatedEmployee)
 
    // 列出所有员工
    employees := manager.ListEmployees()
    fmt.Println("All Employees:")
    for _, employee := range employees {
        fmt.Printf("%v\n", employee)
    }
}

这段代码定义了一个Employee结构体来表示员工，并定义了一个EmployeeManager接口来描述可以进行员工管理的系统所需的方法。然后，我们实现了BasicManager结构体来满足这个接口的要求，并在main函数中演示了如何使用它来添加、获取、更新和列出员工信息。这个示例展示了接口的使用，以及如何通过结构体实现这些接口。