View Compilation Error

0_0_14972438_17347.c:21:1: error: expected identifier or '(' before '/' token
 // 12 primes
 ^
0_0_14972438_17347.c: In function 'isPrime':
0_0_14972438_17347.c:25:32: error: 'primes' undeclared (first use in this function)
     for (i = 0; i < 12 && x >= primes[i]; i++) {
                                ^
0_0_14972438_17347.c:25:32: note: each undeclared identifier is reported only once for each function it appears in
0_0_14972438_17347.c: At top level:
0_0_14972438_17347.c:31:1: error: expected identifier or '(' before '/' token
 // judge current level and previous
 ^