View Compilation Error

0_0_23509677_30893.cpp: In function 'void dfs(char)':
0_0_23509677_30893.cpp:21:10: error: invalid types 'char[int]' for array subscript
   if (a[i] == 0 && b[i].head == a)
          ^
0_0_23509677_30893.cpp:23:7: error: invalid types 'char[int]' for array subscript
    a[i] = 1;
       ^
0_0_23509677_30893.cpp:25:7: error: invalid types 'char[int]' for array subscript
    a[i] = 0;
       ^
0_0_23509677_30893.cpp: In function 'int main()':
0_0_23509677_30893.cpp:38:34: error: 's' was not declared in this scope
   while (scanf("%s", &c), strcmp(s, "0"))
                                  ^