/in/foo.c: In function 'main':
/in/foo.c:20:15: warning: implicit declaration of function 'findsecondmax' [-Wimplicit-function-declaration]
  printf("%d ",findsecondmax(a,n1));
               ^~~~~~~~~~~~~
/in/foo.c: In function 'findsecondmax':
/in/foo.c:27:6: warning: implicit declaration of function 'findmax' [-Wimplicit-function-declaration]
  max=findmax(a,n1);
      ^~~~~~~