Compilare: user.cpp:6: warning: ‘typedef’ was ignored in this declaration user.cpp: In function ‘int main()’: user.cpp:78: warning: format ‘%ld’ expects type ‘long int’, but argument 3 has type ‘int’ user.cpp:16: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:19: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result user.cpp:28: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result