View Compilation Error

1_714_220_18786.cpp: In function 'int main()':
1_714_220_18786.cpp:26:28: error: no match for 'operator[]' (operand types are 'char [105][105]' and 'node')
             printf("%s ",aa[b[i]].r);
                            ^
1_714_220_18786.cpp:27:25: error: no match for 'operator[]' (operand types are 'char [105][105]' and 'node')
         printf("%s\n",aa[b[i]].r);
                         ^