View Compilation Error

0_0_22064811_12472.cpp: In function 'int lcp(int, int)':
0_0_22064811_12472.cpp:83:11: error: missing template arguments before '[' token
     a=rank[a];b=rank[b];
           ^
0_0_22064811_12472.cpp:83:21: error: missing template arguments before '[' token
     a=rank[a];b=rank[b];
                     ^
0_0_22064811_12472.cpp: In function 'int main()':
0_0_22064811_12472.cpp:110:23: error: 'k' was not declared in this scope
         scanf("%d%s",&k,str);
                       ^
0_0_22064811_12472.cpp:115:21: error: missing template arguments before ',' token
         da(r,sa,rank,height,n,27);
                     ^