Compilare: user.cpp:104:2: warning: no newline at end of file user.cpp: In function 'int main()': user.cpp:66: warning: unused variable 'buf' user.cpp:67: warning: unused variable 'sum' user.cpp: In function 'int bin1(int)': user.cpp:35: warning: 'last' may be used uninitialized in this function user.cpp: In function 'int bin2(int)': user.cpp:50: warning: 'last' may be used uninitialized in this function