// The new built-in function allocates memory. The first argument is a type,
// not a value, and the value returned is a pointer to a newly
// allocated zero value of that type.
func new(Type) *Type

import "fmt"

type Student struct {
   name string
   age int
}

func main() {
    // new 一个内建类型
    num := new(int)
    fmt.Println(*num) //打印零值：0

    // new 一个自定义类型
    s := new(Student)
    s.name = "zhangsan"
}

//The make built-in function allocates and initializes an object
//of type slice, map, or chan (only). Like new, the first argument is
// a type, not a value. Unlike new, make's return type is the same as
// the type of its argument, not a pointer to it.
func make(t Type, size …IntegerType) Type

//切片
a := make([]int, 2, 10)  

// 字典
b := make(map[string]int)

// 通道
c := make(chan int, 10)

a := new(int)
a = 1
// 等价于
a := 1