foo.c:12:6: error: expected identifier or '(' before 'int'
   12 | void(int a[],int x)
      |      ^~~
foo.c: In function 'main':
foo.c:30:5: warning: implicit declaration of function 'Prime_Count' [-Wimplicit-function-declaration]
   30 |     Prime_Count(a,x);
      |     ^~~~~~~~~~~

[Hydro](https://hydro.ac)提供评测服务