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: 0
`
    return fmt.Sprintf(strFormat, de.devidee)
}

func Devide(varDevidee int, varDevider int) (result int, errorMsg string)  {
    if varDevider == 0 {
        dData := DevideError {
            devidee: varDevidee,
            devider: varDevider,
        }
        errorMsg = dData.Error()
        return
    } else {
        return varDevidee / varDevider, ""
    }
}

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

    if _, errorMsg := Devide(100, 0); errorMsg != "" {
        fmt.Println("errorMsg is :", errorMsg)
    }
}

运行结果：

100/10 =  10
errorMsg is : 
    Cannot proceed, the divider is zero.
    dividee: 100
    divider: 0