1 #include <iostream> 2 #include <string> 3 using namespace std; 4 struct Node{ 5     #define N 1000 6     int data[N], cnt; 7     string s[N]; 8     Node(int c = 0):cnt(c){} 9     int &operator[](string str) {10         for(int i = 1; i <= cnt; i++) {11             if(s[i] == str) {12                 return data[i];13             }14         }15         data[++cnt] = 0;16         s[cnt] = str;17         return data[cnt];18     }19 };20 int main()21 {22     Node a;23     a["abc"] = 1;24     a["ab"] = 2;25     cout<< a["a"] <<endl<< a["ab"]<< endl<< a["abc"]<< endl;26 }27 //结果：28 //029 //230 //1