Compilare: user.c: In function ‘main’: user.c:9:43: warning: variable ‘u’ set but not used [-Wunused-but-set-variable] int n, m, i, j, nr, c1, c2, sc, smax, u; ^ user.c:9:12: warning: unused variable ‘m’ [-Wunused-variable] int n, m, i, j, nr, c1, c2, sc, smax, u; ^ user.c:10:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^ user.c:13:19: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &nr); ^