Compilare: user.cpp: In function ‘int main()’: user.cpp:99: warning: format ‘%lld’ expects type ‘long long int’, but argument 3 has type ‘int’ user.cpp:46: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:48: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result