Compilare: user.c: In function ‘main’: user.c:7:19: warning: unused variable ‘cmmdc’ [-Wunused-variable] int a, b, i, n, cmmdc, ca, cb, r; ^ user.c:8:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^ user.c:10:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &a, &b); ^