Compilare: user.cpp:46:2: warning: no newline at end of file user.cpp: In function 'int main()': user.cpp:6: warning: unused variable 'k' user.cpp:30: warning: 'y2' is used uninitialized in this function user.cpp:30: warning: 'y1' is used uninitialized in this function user.cpp:38: warning: 'y4' is used uninitialized in this function user.cpp:38: warning: 'y3' is used uninitialized in this function user.cpp:6: warning: 'x3' may be used uninitialized in this function user.cpp:6: warning: 'x2' may be used uninitialized in this function user.cpp:6: warning: 'x1' may be used uninitialized in this function