Compilare: user.cpp: In function ‘void read()’: user.cpp:54:19: warning: ‘w’ may be used uninitialized in this function [-Wmaybe-uninitialized] int x, y, w; ^ user.cpp:34:5: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] if( x > y) ^ user.cpp:54:16: note: ‘y’ was declared here int x, y, w; ^ user.cpp:34:5: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] if( x > y) ^ user.cpp:54:13: note: ‘x’ was declared here int x, y, w; ^ /tmp/cclfNN5A.o: In function `read()': user.cpp:(.text._Z4readv[_Z4readv]+0x60): warning: the `gets' function is dangerous and should not be used.