Compilare: user.c: In function ‘main’: user.c:18: warning: integer constant is too large for ‘long’ type user.c:40: warning: format ‘%d’ expects type ‘int’, but argument 3 has type ‘long long int’ user.c:20: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:22: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result