package mainimport "fmt"type Human struct {name stringage intweight int}type Student struct {Human  // 匿名字段，那么默认Student就包含了Human的所有字段speciality string}func main() {// 我们初始化一个学生mark := Student{Human{"Mark", 25, 120}, "Computer Science"}// 我们访问相应的字段fmt.Println("His name is ", mark.name)fmt.Println("His age is ", mark.age)fmt.Println("His weight is ", mark.weight)fmt.Println("His speciality is ", mark.speciality)// 修改对应的备注信息mark.speciality = "AI"fmt.Println("Mark changed his speciality")fmt.Println("His speciality is ", mark.speciality)// 修改他的年龄信息fmt.Println("Mark become old")mark.age = 46fmt.Println("His age is", mark.age)// 修改他的体重信息fmt.Println("Mark is not an athlet anymore")mark.weight += 60fmt.Println("His weight is", mark.weight)}

mark.Human = Human{"Marcus", 55, 220}mark.Human.age -= 1

package mainimport "fmt"type Skills []stringtype Human struct {name stringage intweight int}type Student struct {Human  // 匿名字段，structSkills // 匿名字段，自定义的类型string sliceint    // 内置类型作为匿名字段speciality string}func main() {// 初始化学生Janejane := Student{Human:Human{"Jane", 35, 100}, speciality:"Biology"}// 现在我们来访问相应的字段fmt.Println("Her name is ", jane.name)fmt.Println("Her age is ", jane.age)fmt.Println("Her weight is ", jane.weight)fmt.Println("Her speciality is ", jane.speciality)// 我们来修改他的skill技能字段jane.Skills = []string{"anatomy"}fmt.Println("Her skills are ", jane.Skills)fmt.Println("She acquired two new ones ")jane.Skills = append(jane.Skills, "physics", "golang")fmt.Println("Her skills now are ", jane.Skills)// 修改匿名内置类型字段jane.int = 3fmt.Println("Her preferred number is", jane.int)}

package mainimport "fmt"type Human struct {name stringage intphone string  // Human类型拥有的字段}type Employee struct {Human  // 匿名字段Humanspeciality stringphone string  // 雇员的phone字段}func main() {Bob := Employee{Human{"Bob", 34, "777-444-XXXX"}, "Designer", "333-222"}fmt.Println("Bob's work phone is:", Bob.phone)// 如果我们要访问Human的phone字段fmt.Println("Bob's personal phone is:", Bob.Human.phone)}

package mainimport ("fmt"
)type Animal struct {Age int
}type Person struct {AnimalSex int}func (animal Animal) getName() string {return "animal"
}// func (person Person) getName() string {
//  return "person"
// }func main() {var animal Animalvar person Personfmt.Println(animal.getName())fmt.Println(person.getName())
}
// 输出
// animal
// animal

package mainimport ("fmt"
)type Animal struct {Age int
}type Person struct {AnimalSex int}func (animal Animal) getName() string {return "animal"
}func (person Person) getName() string {return "person"
}func main() {var animal Animalvar person Personfmt.Println(animal.getName())fmt.Println(person.getName())
}
// 输出
// animal
// persion

package main
import "fmt"
import "unsafe"type T struct {a intb float64
}type A struct{T
}type B struct{*T
}func main() {var t Tvar a Avar b Bfmt.Println(unsafe.Sizeof(t))fmt.Println(unsafe.Sizeof(a))fmt.Println(unsafe.Sizeof(b))var x *Tfmt.Println(unsafe.Sizeof(x))
}
// 输出：
// 16
// 16
// 8
// 8