Compilare: user.cpp: In function ‘void read()’: user.cpp:61: warning: format ‘%ld’ expects type ‘long int’, but argument 3 has type ‘int’ user.cpp:64: warning: format ‘%ld’ expects type ‘long int’, but argument 3 has type ‘int’ user.cpp:67: warning: format ‘%ld’ expects type ‘long int’, but argument 3 has type ‘int’ user.cpp:53: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:55: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:57: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:59: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result