foo.cpp: In function 'int main()':
foo.cpp:50:8: warning: 'Next.bat::x' may be used uninitialized in this function [-Wmaybe-uninitialized]
    bat Next; //第j只蝙蝠下一个状态
        ^~~~
foo.cpp:50:8: warning: 'Next.bat::y' may be used uninitialized in this function [-Wmaybe-uninitialized]