how do I get a STRING out of a file with fscanf_s?

Question

Im trying to read an URL from a file like this

ID 0
FILE ".\\Models\\Woman2.nfg"

And save it into a char tempURL[80] the line im having trouble with is the second one.

fscanf_s(mFile, "ID %d", &TempId);
fscanf_s(mFile, "%*s %s", tempURL);

the first line works fine, but the second one crashes the program What am I doing wrong?

Thanks

The line that says "FILE ".\\Models\\Woman2.nfg" " is a line inside the file I'm reading — DemetrioProgramerOsorio, Sep 11 '15 at 18:14
Use `std::iostream` instead of fscanf. Use std::string instead of char[]. — Micha Wiedenmann, Sep 11 '15 at 18:15
Im in a situation in which im not alowed to use standard libraries — DemetrioProgramerOsorio, Sep 11 '15 at 18:16
What are you expecting to get into `TempId`? Your data file doesn't seem to have any digits in it, yet your `fscanf_s` has a `%d` specifier. — Logicrat, Sep 11 '15 at 18:18
Nice that they are making you hand-code `fscanf`, makes it too easy if you use anything standard built by anyone else. — crashmstr, Sep 11 '15 at 18:18
No, the line im showing is the line in the file I'm trying to read, TempId is fine — DemetrioProgramerOsorio, Sep 11 '15 at 18:18
You have two lines reading data, but one line shown in the file. In other words, you show too much code or too little file. — crashmstr, Sep 11 '15 at 18:19
`Im in a situation in which im not alowed to use standard libraries` Then is `fscanf_s()` a custom function as it is part of the standard? — NathanOliver, Sep 11 '15 at 18:22
http://stackoverflow.com/questions/1893636/fscanf-problem-with-reading-in-string <-- Check this thread out. — user2970916, Sep 11 '15 at 18:33
I think [this](http://stackoverflow.com/questions/20108334/traverse-file-line-by-line-using-fscanf) is going to solve the issue. fscanf never reads the end of line character. This question is more or less a duplicate. — JPhi1618, Sep 11 '15 at 19:15

001 · Accepted Answer · 2015-09-11T19:13:45.040

2

fscanf_s is MS's "safe" fscanf. It requires you to pass the size of the data:

fscanf_s(mFile, "%*s %s", tempURL, 80);

The reason yours compiles without a warning about missing arguments is that fscanf_s accepts a variable number of arguments and the compiler cannot tell if you've passed enough.

edited Sep 11 '15 at 19:13

answered Sep 11 '15 at 19:04

001

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Thank you very much! :D – DemetrioProgramerOsorio Sep 11 '15 at 19:21

how do I get a STRING out of a file with fscanf_s?

1 Answers1