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ch8/2/ch8_2.go

@@ -0,0 +1,38 @@
+package main
+
+import (
+	"fmt"
+	"strconv"
+)
+
+type Printable interface {
+	Number | NumberFloat
+	fmt.Stringer
+}
+
+type Number struct {
+	val int
+}
+
+func (num Number) String() string {
+	return string(strconv.Itoa(num.val))
+}
+
+type NumberFloat struct {
+	val float64
+}
+
+func (num NumberFloat) String() string {
+	return string(strconv.Itoa(int(num.val)))
+}
+
+func Print[T Printable](num T) {
+	fmt.Println(num)
+}
+
+func main() {
+	firstTest := Number{val: 5}
+	secondTest := NumberFloat{val: 7.2}
+	Print(firstTest)
+	Print(secondTest)
+}