View Compilation Error

0_0_27746687_22969.cpp: In function 'int main()':
0_0_27746687_22969.cpp:5:2: error: 'doubel' was not declared in this scope
  doubel a,b,c;
  ^
0_0_27746687_22969.cpp:9:22: error: 'a' was not declared in this scope
   scanf("%lf%lf%lf",&a,&b,&c);
                      ^
0_0_27746687_22969.cpp:9:25: error: 'b' was not declared in this scope
   scanf("%lf%lf%lf",&a,&b,&c);
                         ^
0_0_27746687_22969.cpp:9:28: error: 'c' was not declared in this scope
   scanf("%lf%lf%lf",&a,&b,&c);
                            ^