Local variable pointer display an error, but it is normal operation, can also be successfully written to the text, why want to ask next pointer will display an error?

CodePudding user response:

That refers to the members of the FILE _ptr is empty, not on behalf of the fp1 is empty, everything is normal, you can see the fp1

CodePudding user response:

If you judge is fp2? So why don't fp1 judgment?

CodePudding user response:

Ok, thanks brother