foo.c: In function 'prime':
foo.c:7:11: error: stray '\357' in program
    7 |   if (x % （n/2） == 0)
      |           ^
foo.c:7:12: error: stray '\274' in program
    7 |   if (x % （n/2） == 0)
      |            ^
foo.c:7:13: error: stray '\210' in program
    7 |   if (x % （n/2） == 0)
      |             ^
foo.c:7:17: error: stray '\357' in program
    7 |   if (x % （n/2） == 0)
      |                 ^
foo.c:7:18: error: stray '\274' in program
    7 |   if (x % （n/2） == 0)
      |                  ^
foo.c:7:19: error: stray '\211' in program
    7 |   if (x % （n/2） == 0)
      |                   ^
foo.c: In function 'main':
foo.c:15:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   15 |  scanf("%d", &i);
      |  ^~~~~~~~~~~~~~~

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