// 错误处理
package main
import(
"fmt"
"errors"
)
var errDivByZero = errors.New("division by zero")
func div(dividend, divisor int) (int, error){
if divisor == 0{
return 0, errDivByZero
}
return dividend / divisor, nil
}
func main(){
fmt.Println(div(1, 0))
fmt.Println(div(6, 2))
}