Compilare: user.cpp: In function 'int main()': user.cpp:43: warning: format '%ld' expects type 'long int*', but argument 2 has type 'int*' user.cpp:46: warning: format '%ld' expects type 'long int*', but argument 2 has type 'int*' user.cpp:50: warning: format '%ld' expects type 'long int*', but argument 2 has type 'int*' user.cpp:50: warning: format '%ld' expects type 'long int*', but argument 3 has type 'int*' user.cpp: In function 'int insert(Nod*&, int)': user.cpp:28: warning: control reaches end of non-void function user.cpp: In function 'int free(Nod*&)': user.cpp:20: warning: control reaches end of non-void function