内容简介:设计父结构体—员工。子结构体:工人,农民,教师,科学家(scientist),服务生。(1)其中工人,农民,服务生只有基本工资。(10分)(2)教师除基本工资外,还有课酬(元/天)。(10分)
设计父结构体—员工。子结构体:工人,农民,教师,科学家(scientist),服务生。
(1)其中工人,农民,服务生只有基本工资。(10分)
(2)教师除基本工资外,还有课酬(元/天)。(10分)
(3)科学家除基本工资外,还有年终奖。(10分)
编写一个测试结构体,将各种类型的员工的全年工资打印出来。(10分)
代码示例:
package main import ( "fmt" "unsafe" ) type Employee struct { //基本工资 BaseWage float64 eType E_TYPE //员工类型 } type E_TYPE string const ( WORKER E_TYPE = "工人" FARMER = "农民" TEACHER2 = "老师" SCIENTIST = "科学家" WAITER = "服务员" ) type Worker struct { Employee } func (e *Employee) getYearBaseSalary() float64 { return 12 * e.BaseWage } func (e *Employee) PrintSalary() { fmt.Printf("%s全年工资:", e.eType) switch e.eType { case WORKER: fallthrough case FARMER: fallthrough case WAITER: fmt.Printf("%.2f\n", e.BaseWage) case TEACHER2: //下面使用unsafe包的Pointer将父类(Employee)实例转为子类(Teacher2)实例 //将父类实例转为通用指针 uP := unsafe.Pointer(e) //再转换为本地 Teacher2 结构体 pT := (*Teacher2)(uP) //转换完毕,可以输出子类特有属性 fmt.Println("测试-->老师的课酬是:", pT.ClassRemuneration) fmt.Printf("%.2f\n", e.getYearBaseSalary()+pT.ClassRemuneration) case SCIENTIST: uP := unsafe.Pointer(e) pT := (*Scientist)(uP) fmt.Printf("%.2f\n", e.getYearBaseSalary()+pT.YearEndBonus) default: fmt.Println("未能匹配到对应的员工类型") } } type Farmer struct { Employee } type Teacher2 struct { Employee //课酬 (元/天) ClassRemuneration float64 } type Scientist struct { Employee //年终奖 YearEndBonus float64 } type Waiter struct { Employee } //----------------测试------------------------ func main() { //实例化工人 var worker *Worker = &Worker{Employee: Employee{BaseWage: 120, eType: WORKER}} //实例化农民 var farmer *Farmer = &Farmer{ Employee: Employee{ BaseWage: 150, eType: FARMER, }, } //实例化老师 employee := &Employee{BaseWage: 250, eType: TEACHER2} var teacher2 *Teacher2 = &Teacher2{Employee: *employee} teacher2.ClassRemuneration = 500 //实例化科学家 var scientist *Scientist = &Scientist{ Employee{BaseWage: 300, eType: SCIENTIST}, 200, } //实例化服务人员 var waiter *Waiter = &Waiter{Employee: Employee{BaseWage: 150, eType: WAITER}} //测试输出 worker.PrintSalary() farmer.PrintSalary() waiter.PrintSalary() teacher2.PrintSalary() scientist.PrintSalary() }
运行结果:
image.png
从以上代码中可以看到,我们没有使用接口,给父类绑定一个方法PrintSalary,子类就都可以使用这个方法了,然后在该方法内对父类型强转成了子类型。
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