Compilare: user.cpp:12: warning: ISO C++ forbids declaration of 'main' with no type user.cpp: In function 'int main()': user.cpp:16: warning: format '%ld' expects type 'long int*', but argument 2 has type 'long long int*' user.cpp:16: warning: format '%ld' expects type 'long int*', but argument 3 has type 'long long int*' user.cpp:16: warning: format '%ld' expects type 'long int*', but argument 4 has type 'long long int*' user.cpp:19: warning: format '%ld' expects type 'long int*', but argument 2 has type 'long long int*'