C++中vector可以作为map的键值实例代码

#include<iostream>#include<string>#include<vector>#include<map>using namespace std;int main(){  map<vector<int>, vector<int>> mm;  vector<int> a, b, c;  a.push_back(1);  b.push_back(2);  c.push_back(3);  mm.insert(map<vector<int>, vector<int>>::value_type(a, b));  mm.insert(map<vector<int>, vector<int>>::value_type(b, b));  mm.insert(map<vector<int>, vector<int>>::value_type(c, b));  mm.insert(map<vector<int>, vector<int>>::value_type(a, a));  return 0;}