/in/foo.c: In function 'main':
/in/foo.c:10:6: error: 'c' undeclared (first use in this function)
   if(c=i)
      ^
/in/foo.c:10:6: note: each undeclared identifier is reported only once for each function it appears in
/in/foo.c:15:1: error: expected declaration or statement at end of input
 }
 ^