Compilare: user.cpp: In function 'int prod(long int, long int)': user.cpp:18: warning: unused variable 'j' user.cpp: In function 'int main()': user.cpp:29: warning: format '%s' expects type 'char*', but argument 2 has type 'char (*)[1002]' user.cpp:29: warning: format '%s' expects type 'char*', but argument 3 has type 'char (*)[1002]' user.cpp: In function 'int prod2()': user.cpp:15: warning: control reaches end of non-void function