Question

If I open a file and use fscanf to read a file like this:

2 41
1 50
1 46
….

How do I tell C to read the first number and store it as a variable, then the second as another variable, run a loop, then move on to the next set?

Answer 1

A loop like this is what you’re after:

int type, stories;

while (fscanf(buildingFile, "%d %d", &type, &stories) == 2)
{
    printf("Got type=%d, stories=%d\n", type, stories);
    /* Do something with 'type' and 'stories' */
}

if (ferror(buildingFile))
{
    perror("buildingFile");
}