#7

/*/////////////////////////////////////////////////////////////////
//Class asociated array.                                        ///
//System requirments:                                           ///
//for typename KEY, VALUE must be defined operators <<, ==.     ///
//                                                              ///
/////////////////////////////////////////////////////////////////*/
#include <vector>
#include <iomanip>
#include <iostream>
using namespace std;

template <class KEY, class VALUE>
class mymap {
    struct ITEM {KEY x; VALUE y;};
private:
    vector<ITEM> arr;
public:
    mymap() {}
    int add(KEY, VALUE);
    void list();
    VALUE val(const KEY&) const;
    VALUE operator[](const KEY&) const;
};

template <class KEY, class VALUE>
VALUE mymap<KEY,VALUE>::operator[](const KEY &key) const {
    return this->val(key);
}

template <class KEY, class VALUE>
VALUE mymap<KEY,VALUE>::val(const KEY &key) const {
    for(auto &p : arr) if(key==p.x) return p.y;
    cerr<<"\nError: NOT VALUE FOR KEY \""<<key<<"\"! Default returned."<<endl;
    return VALUE();
}

template <class KEY, class VALUE>
int mymap<KEY,VALUE>::add(KEY key, VALUE value) {
    for(auto &p : arr) if(key==p.x) {cerr<<"\nError: KEY EXIST!\n"; return 0;}
    ITEM tmp={key, value};
    arr.push_back(tmp);
    return 1;
}

template <class KEY, class VALUE>
void mymap<KEY,VALUE>::list() {
    for(auto &p : arr)
    cout<<setw(15)<<p.x<<": "<<setw(15)<<p.y<<endl;
}

int main() {
    mymap<string, double> A;
    A.add("Fate",4.4);
    A.add("Faith",5.5);
    A.add("Delusion",8.8);
    A.add("Delusion",0.0);
    A.list();
    string s1("Fate"),s2("fate"),s3("Faith"),s4("Delusion");
    cout<<"Value for key \""<<s1<<"\": "<<A["Fate"]<<endl;
    cout<<"Value for key \""<<s2<<"\": "<<A[s2]<<endl;
    cout<<"Value for key \""<<s3<<"\": "<<A[s3]<<endl;
    cout<<"Value for key \""<<s4<<"\": "<<A[s4]<<endl;
}