Ders 40

Author: ArinSoftware

40_interfaces/main.go

@@ -0,0 +1,68 @@
+package main
+
+import (
+	"fmt"
+	"math"
+)
+
+type rectangle struct {
+	a, b float64
+}
+
+func (r rectangle) area() float64 {
+	return r.a * r.b
+}
+
+func (r rectangle) circumference() float64 {
+	return 2 * (r.a + r.b)
+}
+
+type circle struct {
+	r float64
+}
+
+func (c circle) area() float64 {
+	return math.Pi * c.r * c.r
+}
+
+func (c circle) circumference() float64 {
+	return 2 * math.Pi * c.r
+}
+
+func (c circle) diameter() float64 {
+	return 2 * c.r
+}
+
+type shape interface {
+	area() float64
+	circumference() float64
+}
+
+func interfaceFunc(i shape) {
+	fmt.Println(i)
+	fmt.Println(i.area())
+	fmt.Println(i.circumference())
+	fmt.Printf("%T", i)
+	fmt.Println()
+}
+
+func main() {
+
+	/* 	r1 := rectangle{3, 8}
+	   	fmt.Println("Area: ", r1.area())
+	   	fmt.Println("Circumference: ", r1.circumference())
+
+	   	fmt.Println()
+		   interfaceFunc(r1) */
+
+	r1 := rectangle{3, 8}
+	interfaceFunc(r1)
+
+	fmt.Println()
+
+	c1 := circle{5}
+	interfaceFunc(c1)
+
+}
+
+// concrete data type