/in/foo.c: In function 'main':
/in/foo.c:24:17: error: 'min' undeclared (first use in this function)
  printf("%d\n", min);  // 8
                 ^~~
/in/foo.c:24:17: note: each undeclared identifier is reported only once for each function it appears in
/in/foo.c:23:6: warning: unused variable 'max' [-Wunused-variable]
  int max=FindMin(a, n);
      ^~~
/in/foo.c:21:6: warning: unused variable 'i' [-Wunused-variable]
  int i, a[]={1,5,2,5,4}, n=8;
      ^