指针示例

bilibili/aceid/pointor/test2/test.go

@@ -0,0 +1,42 @@
+package main
+
+import "fmt"
+
+func swap(a int, b int) (int, int) {
+	var tmp int
+	tmp = a
+	a = b
+	b = tmp
+	return a, b
+}
+
+func swap2(pa *int, pb *int) {
+	var temp int
+	temp = *pa // temp = main::a
+	*pa = *pb  // main::a = main::b
+	*pb = temp // main::b = temp
+}
+
+func main() {
+	var a int = 10
+	var b int = 20
+
+	fmt.Println("a = ", a, " b = ", b)
+
+	swap2(&a, &b)
+
+	// a, b = swap(a, b)
+
+	fmt.Println("a = ", a, " b = ", b)
+
+	var p *int
+	p = &a
+	fmt.Println(&a)
+	fmt.Println(p)
+
+	var pp **int
+	pp = &p
+	fmt.Println(&p)
+	fmt.Println(pp)
+	fmt.Println(&pp)
+}