Compilare: user.cpp: In function 'void read()': user.cpp:34: warning: format '%ld' expects type 'long int*', but argument 2 has type 'int*' user.cpp:34: warning: format '%ld' expects type 'long int*', but argument 3 has type 'int*' user.cpp:34: warning: format '%ld' expects type 'long int*', but argument 4 has type 'int*' user.cpp:37: warning: format '%ld' expects type 'long int*', but argument 2 has type 'int*' user.cpp:37: warning: format '%ld' expects type 'long int*', but argument 3 has type 'int*' user.cpp: In function 'void write()': user.cpp:72: warning: format '%ld' expects type 'long int', but argument 2 has type 'int' user.cpp:73: warning: format '%ld' expects type 'long int', but argument 2 has type 'int'