/in/foo.c: In function 'main':
/in/foo.c:5:23: error: expected ';' before '\U0000ff1b'
    5 |         scanf("%d",&n)；
      |                       ^~
      |                       ;
/in/foo.c:7:13: error: 'i' undeclared (first use in this function)
    7 |         for(i=3;i<=10000000;i++){
      |             ^
/in/foo.c:7:13: note: each undeclared identifier is reported only once for each function it appears in
/in/foo.c:9:34: warning: format '%d' expects a matching 'int' argument [-Wformat=]
    9 |                         printf("%d is a primer\n");
      |                                 ~^
      |                                  |
      |                                  int
/in/foo.c:10:25: error: expected '}' before 'else'
   10 |                         else{
      |                         ^~~~
/in/foo.c:11:42: warning: format '%d' expects a matching 'int' argument [-Wformat=]
   11 |                                 printf("%d is not primer\n")
      |                                         ~^
      |                                          |
      |                                          int
/in/foo.c:11:61: error: expected ';' before '}' token
   11 |                                 printf("%d is not primer\n")
      |                                                             ^
      |                                                             ;
   12 |                                 }
      |                                 ~                            
/in/foo.c:14:17: error: expected declaration or statement at end of input
   14 |                 }
      |                 ^