foo.c: In function 'Insert':
foo.c:5:17: error: expected expression before ')' token
    5 |  for(j=0;j<=n;++)
      |                 ^
foo.c:4:8: warning: unused variable 't' [-Wunused-variable]
    4 |  int j,t;
      |        ^
foo.c:17:1: warning: control reaches end of non-void function [-Wreturn-type]
   17 | }
      | ^
foo.c: In function 'main':
foo.c:21:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   21 |  scanf("%d",&n);
      |  ^~~~~~~~~~~~~~
foo.c:23:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   23 |   scanf("%d",&a[i]);
      |   ^~~~~~~~~~~~~~~~~
foo.c:24:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   24 |  scanf("%d",&x);
      |  ^~~~~~~~~~~~~~

[Hydro](https://hydro.ac)提供评测服务