/in/foo.c: In function 'main':
/in/foo.c:36:21: error: 'max' undeclared (first use in this function)
   if (cat[go].k==1) max=10;
                     ^~~
/in/foo.c:36:21: note: each undeclared identifier is reported only once for each function it appears in
/in/foo.c:41:2: error: expected ';' before 'while'
  while(mouse<max)
  ^~~~~
/in/foo.c:23:6: warning: variable 'mouse' set but not used [-Wunused-but-set-variable]
  int mouse;
      ^~~~~
/in/foo.c:22:6: warning: variable 'sum' set but not used [-Wunused-but-set-variable]
  int sum;
      ^~~