View Compilation Error

0_0_13886822_32051.c: In function 'main':
0_0_13886822_32051.c:13:10: error: 'bj' undeclared (first use in this function)
   memset(bj,0,sizeof(bj));
          ^
0_0_13886822_32051.c:13:10: note: each undeclared identifier is reported only once for each function it appears in
0_0_13886822_32051.c:15:10: error: 'z' undeclared (first use in this function)
   memset(z,0,sizeof(z));
          ^
0_0_13886822_32051.c:18:24: error: subscripted value is neither array nor pointer nor vector
   for(c=0;c<b;c++)if(ch[c]=='1')in[d+1]++;  
                        ^