View Compilation Error

0_0_17324219_22444.cpp: In function 'void getnext(int)':
0_0_17324219_22444.cpp:10:11: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
     next[0] = -1;
           ^
0_0_17324219_22444.cpp:13:23: error: 'str' was not declared in this scope
         if(j == -1 || str[i] == str[j])
                       ^
0_0_17324219_22444.cpp:17:19: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
             next[i] = j;
                   ^
0_0_17324219_22444.cpp:20:23: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
             j = next[j];
                       ^