Which ffunction do I use?

Hello,

I would like to read in a file of the form:

1 2 1
1 3 1
1 4 1
....
2 1 1
2 4 1
...

etc

and store the int in the right hand column in the two dimensional array at array[i][j] where i is obviously the first entry of a line and j the second.

My approach presently is to use fgets and read in line by line, obtaining a char[] and then hop through it, doing atoi on the fields seperated by white space.

Is this implementation plausible? I have found a panoply of functions beginning with f (hence ffunctions - a terrible joke I know) for working with files and get the feeling that there may be a slicker implementation.

Files are generally well formatted, you should be able to use fscanf without any "issues" here:

Code:

---

char  array[M][N]; /* M and N are macros for the size */
FILE *fp;
int  i, j;
int  x;

/* Open fp with fopen here */
/* Check for success */
if (!fp) {
  perror("File open failure");
}
else {
  while (fscanf(fp, "%d%d%d", &i, &j, &x) == 3) {
    /* Verify indices */
    if (i < 0 || i >= M || j < 0 || j >= N) {
      fprintf(stderr, "Index out of range\n");
      continue;
    }
    array[i][j] = x;
  }
  /* Check to see why we stopped */
  if (!feof(fp)) {
    if (ferror(fp) {
      fprintf(stderr, "Input error\n");
    }
    else {
      fprintf(stderr, "Invalid input\n");
    }
  }
}

---

Thankyou Prelude.