Thread: Reading text out of a file

I was wondering how I would go about making up a list of questions and answers in notepad, and then having my program read them and then check the answer out of this one file. I perfected my little true and false quiz using tables. But its a pain if I want to add a new question to have to compile the entire code over again. This way I can just change it in the questions.txt file and be done with it. I know how to write the results of something into the file. Just not sure on how to read from the file, I haven't found a tutorial that explains that part yet.

Nate

Here are some real basics. I'm sure someone else could probably elaborate/be more helpful.

First you need to declare a pointer to a file:

FILE *in_file;


then you need to open the file for reading and check to see if it worked:

in_file = fopen("File name/path goes here", "r");
if (in_file == (FILE *) NULL)
{
printf("Failed to open file.");
exit(1);
}

then you can read each line with something like

while(fgets(stringname, n, in_file) != NULL){

**perform what you want to do with each line from the file **

}

where "stringname" is the string you want to store the line from the file in and n-1 is the maximum # of characters it will read per line... it will read up to that or until it finds a "\n"

finally, close the file

fclose(in_file);