golang的强制类型转换

【转】https://studygolang.com/articles/21591?fr=sidebar

package main

import "fmt"

func main() {
    var a float32 = 5.6
    var b int = 10
    fmt.Println (a * float32(b))
}

package main

import "unsafe"
import "fmt"

func main() {
    var a int =10
    var b *int =&a
    var c *int64 = (*int64)(unsafe.Pointer(b))
    fmt.Println(*c)
}

package main

import "fmt"

func main() {
    var a interface{} =10
    switch a.(type){
    case int:
            fmt.Println("int")
    case float32:
            fmt.Println("string")
    }
}

package main

import "fmt"

func main() {
    var a interface{} =10
    t,ok:= a.(int)
    if ok{
        fmt.Println("int",t)
    }
    t2,ok:= a.(float32)
    if ok{
        fmt.Println("float32",t2)
    }
}