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interface.go
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interface.go
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package main
import (
"fmt"
)
type unknownType interface{}
type SalaryCalculator interface {
CalculateSalary() (unknownType, int)
}
type Employee struct {
name string
empId unknownType
}
type Permanent struct {
Employee
basicpay int
pf int
}
type Contract struct {
Employee
basicpay int
}
func (p Permanent) CalculateSalary() (unknownType, int) {
return p.empId, p.basicpay + p.pf
}
func (c Contract) CalculateSalary() (unknownType, int) {
return c.empId, c.basicpay
}
func totalExpense(s []SalaryCalculator) {
expense := 0
fmt.Println("For empId: ")
for _, v := range s {
empId, exp := v.CalculateSalary()
expense += exp
fmt.Println(empId)
}
fmt.Printf("Total Expense Per Month %d Taka.\n", expense)
}
func main() {
emp1 := Employee{"Shaon", 1}
emp2 := Employee{"Tropa", 2}
emp3 := Employee{"Sujan", "con-1"}
per_e1 := Permanent{emp1, 5000, 20}
per_e2 := Permanent{emp2, 6000, 30}
con_e1 := Contract{emp3, 3000}
employees := []SalaryCalculator{per_e1, per_e2, con_e1}
// fmt.Println(employees.name)
totalExpense(employees)
}