View Compilation Error

0_0_25940609_17139.cpp: In function 'int main()':
0_0_25940609_17139.cpp:87:21: error: no matching function for call to 'Suffix_Array::ins(char*, int&)'
         SA.ins(s+1,n); SA.DA(); SA.cal_height();
                     ^
0_0_25940609_17139.cpp:87:21: note: candidate is:
0_0_25940609_17139.cpp:28:10: note: void Suffix_Array::ins(int*, int)
     void ins(int *str,int len) {s=str;n=len+1;}
          ^
0_0_25940609_17139.cpp:28:10: note:   no known conversion for argument 1 from 'char*' to 'int*'