fscanf and 2d array of integers

Question

disclaimer: I'm a struggling beginner

My assignment is to read integers from an input txt file into a 2D array. When i used printf's to debug/test my fscanf isn't reading the correct values from the file. i can't figure out why.

my code is as follows:

void makeArray(int scores[][COLS], FILE *ifp){
    int i=0, j=0, num, numrows = 7, numcols = 14;

    for(i = 0; i < numrows; ++i){
        for(j = 0; j < numcols; ++j){
            fscanf(ifp, "%d", &num);
            num = scores[i][j];
        }
    }
}

int main(){
    int scoreArray[ROWS][COLS];
    int i=0, j=0;
    FILE *ifp;
    ifp = fopen("scores.txt", "r");

    makeArray(scoreArray, ifp);

    system("pause");
    return 0;   
}

Answer 1

You were assigning num (what you read from the file) into the value of the array scores[i][j] which is doing it backwards. The following code will read an arbitrary number of spaces in between each number, until it reaches the end of the file.

void makeArray(int scores[][COLS], FILE *ifp) {
    int i=0, j=0, num, numrows = 7, numcols = 14, ch;

    for (i=0; i < numrows; ++i) {
        for (j=0; j < numcols; ++j) {
            while (((ch = getc(ifp)) != EOF) && (ch == ' ')) // eat all spaces
            if (ch == EOF) break;                            // end of file -> break
            ungetc(ch, ifp);
            if (fscanf("%d", &num) != 1) break;
            scores[i][j] = num;                              // store the number
        }
    }
}

This Stack Overflow post covers this problem in greater detail.