Protocol Inheritance
Swift allows protocols to inherit properties from its defined properties. It is similar to that
of class inheritance, but with the choice of listing multiple inherited protocols separated by
commas.
protocol classa {
var no1: Int { get set }
func calc(sum: Int)
}protocol result {
func print(target: classa)
}class student2: result {
func print(target: classa) {
target.calc(1)
}
}class classb: result {
func print(target: classa) {
target.calc(5)
}
}class student: classa {
var no1: Int = 10func calc(sum: Int) {
no1 -= sum
println("Student attempted \(sum) times to pass")if no1 <= 0 {
println("Student is absent for exam")
}
}