foo.c: In function 'PrimeCount':
foo.c:24:8: warning: unused variable 'j' [-Wunused-variable]
   24 | {int i,j,count=0,flag=0;
      |        ^
foo.c: In function 'main':
foo.c:13:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   13 |  scanf("%d%d",&n1,&n2);
      |  ^~~~~~~~~~~~~~~~~~~~~
foo.c:15:4: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   15 |  { scanf("%d",&a[i]);
      |    ^~~~~~~~~~~~~~~~~
foo.c:18:4: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   18 |  { scanf("%d",&b[i]);
      |    ^~~~~~~~~~~~~~~~~

[Hydro](https://hydro.ac)提供评测服务