View Compilation Error

0_0_27478514_26101.cpp: In function 'int main()':
0_0_27478514_26101.cpp:11:18: error: 'cc' was not declared in this scope
   for(q=a+strlen(cc)-1,p=a[0]=='-'?cc+1:cc,flag=0;q>=p;q--)
                  ^