Opening a file in c programming in xcode

Question

I am trying to write a file to open a file and read the contents of that file in C. I am using xcode but the file pointer returns a value null.

int main(int argc, char** argv)
{    
    FILE *fp;
    fp=fopen("input.txt","r");
    if (fp==NULL)
        printf("error");
}

This shows error as the output. Could someone help me to find the right place to put the file input.txt in the project?

Just for fun (not really), instead of `printf("error");` try `perror("error");`. — pmg, Aug 19 '11 at 13:15
What target type are you using in Xcode? Is it Application or Command Line Tool? — Per Johansson, Aug 19 '11 at 13:38

score 6 · Accepted Answer · answered Aug 19 '11 at 12:47

The file would need to go in the "current directory" where the program is launched. This is configurable. In the "Groups and Files" pane, expand "Executables" and pick your executable. Press Command-I to open the info window. Near the bottom of the "General" tab, you can select the current directory for when the application is launched.

score 1 · Answer 2 · answered Aug 29 '13 at 05:47

1

In your file list on the left right click on your product (executable) and click on "Show in Finder". Paste the file you want to open in your program there.

answered Aug 29 '13 at 05:47

vivek241

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score 1 · Answer 3 · answered Apr 17 '14 at 22:49

This is somewhat related, but if you want to open a file in iOS, then get the file path via the following:

NSString *filePath = [[NSBundle mainBundle] pathForResource:@"Jon" ofType:@"CSV"];

FILE *file = fopen([filePath cStringUsingEncoding:NSUTF8StringEncoding], "r");

score 0 · Answer 4 · answered Aug 19 '11 at 12:48

0

The file is not in the working directory or you don't have the right to read it.

answered Aug 19 '11 at 12:48

Karoly Horvath

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score -1 · Answer 5 · answered Aug 22 '11 at 11:01

-1

i got the answer .I needed to store the file in the debug folder because xcode runs the file from the debug folder which is

answered Aug 22 '11 at 11:01

noddy

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Opening a file in c programming in xcode

5 Answers5

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