Compilare: user.c: In function ‘main’: user.c:9: warning: unused variable ‘v’ user.c:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:19: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:13: warning: ‘s’ may be used uninitialized in this function