Compilare: user.c: In function ‘main’: user.c:17:10: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d%d%d%d", &punct, &n, &k, &D ) ; ^ user.c:20:12: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d%d", &l, &c ) ; ^ user.c:34:12: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d", &m ) ; ^ user.c:37:14: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d%d", &x, &y ) ; ^ user.c:39:62: warning: ‘j’ may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf (fout, "%d\n", s[i][j] - s[i-d][j-d] - s[i-d][j+d] + s[i - (D + 2)][j] ) ; ^