Compilare: user.cpp: In function 'int main()': user.cpp:40: warning: format '%ld' expects type 'long int*', but argument 2 has type 'int*' user.cpp:40: warning: format '%ld' expects type 'long int*', but argument 3 has type 'int*' user.cpp:40: warning: format '%ld' expects type 'long int*', but argument 4 has type 'int*' user.cpp:41: warning: format '%ld' expects type 'long int', but argument 2 has type 'int' user.cpp: In function 'int rec(int, int, int)': user.cpp:34: warning: control reaches end of non-void function