Go 实现异常处理机制

实例：

 package main

 import "fmt"

 type DevideError struct {
     devidee int
     devider int
 }

 func (de *DevideError) Error() string {
     strFormat := `
     Cannot proceed, the divider is zero.
     dividee: %d
     divider:
 `
     return fmt.Sprintf(strFormat, de.devidee)
 }

 func Devide(varDevidee int, varDevider int) (result int, errorMsg string)  {
     if varDevider ==  {
         dData := DevideError {
             devidee: varDevidee,
             devider: varDevider,
         }
         errorMsg = dData.Error()
         return
     } else {
         return varDevidee / varDevider, ""
     }
 }

 func main()  {
     if result, errorMsg := Devide(, ); errorMsg == "" {
         fmt.Println("100/10 = ", result)
     }

     if _, errorMsg := Devide(, ); errorMsg != "" {
         fmt.Println("errorMsg is :", errorMsg)
     }
 }

运行结果：

/ =
errorMsg is :
    Cannot proceed, the divider is zero.
    dividee:
    divider: