/in/foo.cc: In function 'int main()':
/in/foo.cc:6:6: error: 'i' was not declared in this scope
  for(i=1;i<=c;i++)
      ^
/in/foo.cc:12:7: error: 'g' was not declared in this scope
   for(g=1;g<=f;g++)
       ^
/in/foo.cc:17:9: error: 'e' was not declared in this scope
     for(e=1;e<=b;e++)
         ^