/in/foo.cc: In function 'int main()':
/in/foo.cc:12:7: warning: 'pos' may be used uninitialized in this function [-Wmaybe-uninitialized]
   int pos;//末尾第一个不是0的位置,为了去掉0算正确的位置
       ^~~
/in/foo.cc:11:7: warning: 'point' may be used uninitialized in this function [-Wmaybe-uninitialized]
   int point;//小数点位置
       ^~~~~