Compilare: user.cpp: In function 'int main()': user.cpp:5: warning: 'c' may be used uninitialized in this function user.cpp:5: note: 'c' was declared here user.cpp:5: warning: 'b' may be used uninitialized in this function user.cpp:5: note: 'b' was declared here user.cpp:5: warning: 'a' may be used uninitialized in this function user.cpp:5: note: 'a' was declared here