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1、error接口的使用 示例： package main
import "fmt"
import "errors"
func main() {
//var err1 error = fmt.Errorf("%s", "this is normol err")
err1 := fmt.Errorf("%s", "this is normal err1")
fmt.Println("err1 = ", err1)
err2 := errors.New("this is normal err2")
fmt.Println("err2 = ", err2)
}
执行结果： err1 = this is normal err1 err2 = this is normal err2
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