View Compilation Error

0_0_37450223_29891.cpp: In function 'void Free(Trie*)':
0_0_37450223_29891.cpp:40:10: error: 'struct Trie' has no member named 'ch'
   if (p->ch[i])
          ^
0_0_37450223_29891.cpp:41:12: error: 'struct Trie' has no member named 'ch'
    Free(p->ch[i]);
            ^