/in/foo.c: In function 'main':
/in/foo.c:7:11: warning: passing argument 2 of 'noco' from incompatible pointer type [-Wincompatible-pointer-types]
  s=noco(n,&a);
           ^
/in/foo.c:2:5: note: expected 'int *' but argument is of type 'int (*)[100]'
 int noco(int n,int *a);
     ^~~~
/in/foo.c: In function 'noco':
/in/foo.c:29:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^