View Compilation Error

0_0_27013609_21097.cpp: In function 'int main()':
0_0_27013609_21097.cpp:6:2: error: 'doubie' was not declared in this scope
  doubie rat;
  ^
0_0_27013609_21097.cpp:9:3: error: 'rat' was not declared in this scope
   rat=1.0/a;
   ^