Compilare: user.cpp:2: warning: ISO C++ forbids declaration of 'main' with no type user.cpp: In function 'int main()': user.cpp:4: warning: unused variable 's2' user.cpp:4: warning: unused variable 's3' user.cpp:4: warning: unused variable 'x' user.cpp:4: warning: unused variable 'k2' user.cpp:4: warning: unused variable 'k3' user.cpp:4: warning: unused variable 'l2' user.cpp:4: warning: unused variable 'l3' user.cpp:4: warning: 'poz' may be used uninitialized in this function user.cpp:4: warning: 'k1' may be used uninitialized in this function