more

30-new.go

@@ -0,0 +1,15 @@
+package main
+
+import "fmt"
+
+func one(xPtr *int) {
+    *xPtr = 1
+}
+func main() {
+    xPtr := new(int)
+	fmt.Println(xPtr)
+	fmt.Println(*xPtr)
+    one(xPtr)
+    fmt.Println(xPtr)
+    fmt.Println(*xPtr)
+}

31-structs.go

@@ -0,0 +1,16 @@
+package main
+
+import "fmt"
+
+type Circle struct {
+    x, y, r float64
+}
+
+func main() {
+	cEmptyPtr := new(Circle)
+	fmt.Println(cEmptyPtr)
+	fmt.Println(*cEmptyPtr)
+	cValue := Circle{x: 1, y: 2, r: 5}
+	fmt.Println(&cValue)
+	fmt.Println(cValue)
+}