结构体转换

package main
import "fmt"
type Student struct{
	Age int
}

type Person struct {
	Age int
}

type Stu Student
func main(){
	//【1】结构体是用户单独定义的类型，和其它类型进行转换时需要有完全相同的字段(名字、个数和类型)
	var s Student = Student {10}
	fmt.Println(s)
	var p Person = Person{12}
	//s = p // 不能这样直接赋值, a4.go:16:4: cannot use p (type Person) as type Student in assignment
	s = Student(p)  // 只能通过结构体强转
	fmt.Println(s)
	fmt.Println(p)


	//【2】结构体进行type重新定义(相当于取别名)，Golang认为是新的数据类型，但是相互间可以强转
	var s1 Student = Student{19}
	fmt.Println(s1)
	var s2 Stu = Stu{20}
	s1 =Student(s2)
	fmt.Println(s1)
	fmt.Println(s2)
}

输出

{10}
{12}
{12}
{19}
{20}
{20}