/in/foo.c:2:6: warning: return type of 'main' is not 'int' [-Wmain]
 void main()
      ^~~~
/in/foo.c: In function 'PrimeCount':
/in/foo.c:31:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
/in/foo.c: In function 'main':
/in/foo.c:19:2: warning: 'count1' may be used uninitialized in this function [-Wmaybe-uninitialized]
  printf("%d %d",count1,count2);
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~