#include #include using namespace std;class Data{public: Data(int val = 0) { mVal = val; } int getVal() const { return mVal; } void setVal(int val) {mVal = val; }protected: int mVal;};int main(int argc, char** argv){ map dataMap; dataMap[1] = Data(4); dataMap[1] = Data(6); map::iterator it = dataMap.find(1); if (it != dataMap.end()) { it->second.setVal(100); } return (0);}