/in/foo.c: In function 'a':
/in/foo.c:8:8: error: expected '(' before 'x'
    8 |     if x%i=0;
      |        ^
      |        (
/in/foo.c:8:8: warning: statement with no effect [-Wunused-value]
/in/foo.c: In function 'main':
/in/foo.c:17:11: warning: format '%d' expects a matching 'int' argument [-Wformat=]
   17 |  printf("%d is not aprimer!");
      |          ~^
      |           |
      |           int
/in/foo.c:19:26: warning: format '%d' expects a matching 'int' argument [-Wformat=]
   19 |                 printf("%d is a primer!");
      |                         ~^
      |                          |
      |                          int