Compilare: user.c: In function ‘main’: user.c:15: warning: too many arguments for format user.c:20: warning: too many arguments for format user.c:9: warning: unused variable ‘v’ user.c:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:20: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result