Compilare: user.c: In function ‘main’: user.c:15: warning: format ‘%ld’ expects type ‘long int *’, but argument 3 has type ‘long long int *’ user.c:17: warning: format ‘%ld’ expects type ‘long int *’, but argument 3 has type ‘long long int *’ user.c:31: warning: format ‘%ld’ expects type ‘long int’, but argument 3 has type ‘long long int’ user.c:15: 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