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virtuacasper

quick fstream question

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im just brushing up my c++ skills(if any) and i stumbled apon a problem can somebody please tell me why the function below validates a none existant file..? bool Load(const char *path) { ifstream ifile(path,ios::in|ios::nocreate); if(ifile.bad()) { if(ifile.is_open()){ ifile.close(); } return false; } ifile.close(); return true; } i call it via if(!Load("x.txt")) // x.txt doesnt exist { cout<<"error: file not found.\n"; }

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Failing to open a file doesn't set ios::bad flag, so your call to ifile.bad () returns false, even when the file is not open.

You basically want to check wheter you were able to open the file, for which there is a function called is_open.


if (!file.is_open ())
return false;


Oxyd

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[attention][attention] There is no ios::nocreate in standard IOStream. [attention][attention]

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