Compilare: user.cpp: In function ‘int main()’: user.cpp:17: warning: too many arguments for format user.cpp:52: warning: too many arguments for format user.cpp:55: warning: format ‘%ld’ expects type ‘long int’, but argument 5 has type ‘int’ user.cpp:20: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result