/in/foo.c: In function 'main':
/in/foo.c:42:13: warning: 'mouse' may be used uninitialized in this function [-Wmaybe-uninitialized]
  while(mouse<max)
        ~~~~~^~~~
/in/foo.c:53:2: warning: 'sum' may be used uninitialized in this function [-Wmaybe-uninitialized]
  printf("%d\n",sum);
  ^~~~~~~~~~~~~~~~~~