Compilare: user.c: In function ‘main’: user.c:63: warning: format ‘%d’ expects type ‘int’, but argument 3 has type ‘long long int’ user.c:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:17: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:5: warning: ‘l’ may be used uninitialized in this function user.c:5: warning: ‘c’ may be used uninitialized in this function