Question

This is the code (located inside a function) that opens a file and then reads its content with fscanf():

FILE *file = NULL;
int xTemp = 0, xTot = 0;
int yTemp = 0, yTot = 0;
int zTemp = 0, zTot = 0;
int i = 0;

file = fopen(nomeFile, "r");

if(file == NULL) {

    return 0;

} else {

    while(!feof(file)) {

        if(fscanf(file, "%f %f %f", &xTemp, &yTemp, &zTemp) != 3) {

            return -1;

        } else {

            i++;
            xTot += xTemp;
            yTot += yTemp;
            zTot += zTemp;

        }

    }

    coords.x = xTot/i;
    coords.y = yTot/i;
    coords.z = zTot/i;

    return i;

}

And this is the content of the file i’m reading using fscanf():

3.5 2.1 -1.4
4.1 -4.1 2.9
2.6 2.5 3.2
-1.2 0.0 4.3
1.5 1.3 6.0

The problem is that fscanf() won’t assign to xTemp, yTemp and zTemp the proper values.

Answer 1

Use float variables instead of ints. In fscanf you are using %f but the variables are ints which invokes undefined behaviour.