Compilare: user.cpp: In function 'int main()': user.cpp:7: warning: too many arguments for format user.cpp:24: warning: format '%lld' expects type 'long long int', but argument 4 has type 'long int' user.cpp:3: warning: 'b' may be used uninitialized in this function user.cpp:3: warning: 'a' may be used uninitialized in this function