/in/foo.c: In function 'main':
/in/foo.c:23:32: error: 'averagr' undeclared (first use in this function); did you mean 'average'?
   23 |                 printf(".lf\n",averagr)
      |                                ^~~~~~~
      |                                average
/in/foo.c:23:32: note: each undeclared identifier is reported only once for each function it appears in
/in/foo.c:23:40: error: expected ';' before '}' token
   23 |                 printf(".lf\n",averagr)
      |                                        ^
      |                                        ;
   24 |                 }
      |                 ~                       
/in/foo.c:18:16: warning: unused variable 'average' [-Wunused-variable]
   18 |         double average = sum / 5.0;
      |                ^~~~~~~
/in/foo.c:25:16: error: 'o' undeclared (first use in this function)
   25 |         return o;
      |                ^