package main
import
"fmt"
type human inte***ce
type student struct
func (s *student) sayhi()
type teacher struct
func (t *teacher) sayhi()
func main()
i = &s
i.sayhi()
var t teacher = teacher
i=&t
i.sayhi()
}//輸出結果
//lili 1
//bobo 2
package main
import
"fmt"
type human inte***ce
type student struct
func (s *student) sayhi()
type teacher struct
func (t *teacher) sayhi()
func who(i human)
func main()
who(&s)
var t teacher = teacher
who(&t)
}//輸出結果
//654321 lili 1
//123456 bobo 2
接下來讓我們用乙個計算機的例項來介看看介面的用處！
1）使用物件導向的思想實現乙個加減功能的計算器
package main
import
"fmt"
type opertion struct
func (o *opertion) getresult(info string, num1 float64, num2 float64) (result float64)
return
}func main()
//輸出結果
//6//3
2）用介面實現
package main
import
"fmt"
type opertion struct
type getresult inte***ce
type add struct
func (a *add) getresult() float64
type sub struct
func (s *sub) getresult () float64
type factory struct
func oper(i getresult)float64
func(f *factory)createfaction(info string,num1 float64,num2 float64)float64 }
result=oper(add)
case
"-":
sub := &sub}
result=oper(sub)
}return result
}func main()
//輸出結果
//30
//10
package main
import
"fmt"
type humaner inte***ce
type person inte***ce
type student struct
func (s *student)sayhi()
func (sa *student)sing(s string)
func main()
i=si.sayhi()
i.sing("哥哥")
}//輸出結果
//hello
//student 在唱著 哥哥
package main
import
"fmt"
type humaner inte***ce
type person inte***ce
type student struct
func (s *student) sayhi()
func (sa *student) sing(s string)
func main()
i = s
var m humaner
//i=m //err
m=sm.sayhi()
i.sing("哥哥")
}//輸出結果
//hello
//student 在唱著 哥哥
例如：
package main
import
"fmt"
func main() =1
fmt.println("i=",i)
i="abc"
fmt.println("i=",i)
}//輸出結果
//i= 1
//i= abc
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