View Compilation Error

0_0_30252962_9407.cpp: In function 'void insertWords(char*)':
0_0_30252962_9407.cpp:22:21: error: request for member 'size' in 's', which is of non-class type 'char*'
     for(int i=0;i<s.size();i++){
                     ^
0_0_30252962_9407.cpp: In function 'int query(char*)':
0_0_30252962_9407.cpp:64:21: error: request for member 'size' in 's', which is of non-class type 'char*'
     for(int i=0;i<s.size();i++){    //遍历文本串
                     ^