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Creating a file using the fopen () function

I am just building a basic file handling program. this is the code:

#include <stdio.h>
int main()
{
FILE *p;
p=fopen("D:\\TENLINES.TXT","r");
if(p==0)
{
    printf("Error",);

}

fclose(p);
}

This gives an error, I cannot create files that tried to reinstall the compiler and use different locations and filenames, but did not succeed. I am using Windows 7 and the compiler is Dev C ++ version 5

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3 answers


Change the opening mode:

p=fopen("D:\\TENLINES.TXT","r");//this will not _create_ a file
if(p==0)

For this:



p=fopen("D:\\TENLINES.TXT","w");//this will create a file for writing.
if(p==NULL)                     //If the file already exists, it will write over
                                //existing data.

If you want to add content to an existing file, you can use "a +" for open mode.

Link for fopen (for more open modes and more information on the fopen family of functions)

+7


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According to the tutorial , it fopen

returns NULL on error. Therefore you have to check if it matches p

NULL

.



Also, printf("Error",);

omit the comma after the line.

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Yes, you must open the file in write mode. Which creates the file. Read mode is only for reading content, or you can use "r +" for reading and writing.

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