foo.cc: In function ‘int main()’:
foo.cc:10:32: error: expected ‘;’ before ‘e’
   10 |                 f=ceil(a*1.0/b)
      |                                ^
      |                                ;
   11 |                 e=f*2
      |                 ~               
foo.cc:5:23: warning: unused variable ‘e’ [-Wunused-variable]
    5 |         int a,b,c,d=0,e=0,f=0;
      |                       ^