foo.c: In function ‘main’:
foo.c:28:20: warning: implicit declaration of function ‘zscheck’; did you mean ‘zschek’? [-Wimplicit-function-declaration]
   28 |                 if(zscheck(j)==0){
      |                    ^~~~~~~
      |                    zschek
foo.c:29:32: warning: missing terminating " character
   29 |                         printf("%d“，j);
      |                                ^
foo.c:29:32: error: missing terminating " character
   29 |                         printf("%d“，j);
      |                                ^~~~~~~~~
foo.c:30:17: error: expected expression before ‘}’ token
   30 |                 }
      |                 ^
foo.c:29:32: error: expected ‘;’ before ‘}’ token
   29 |                         printf("%d“，j);
      |                                ^
      |                                ;
   30 |                 }
      |                 ~