Question

In C++ implement an “associative array” that uses strings instead of integer indexes for keys and stores values of type double. Overload the index operator (operator[]) to provide access as in the following example:

AssociativeArray prices;

prices["Toaster Oven"] = 19.95;

then

Turn the AssociativeArray class  into a template AssociativeArray<K, V>. Use a vector<pair<K, V>> to hold the key/value pairs. You don’t have to overload the [] operator. Instead, provide member functions put and get:

AssociativeArray<string, double> prices;

prices.put("Toaster Oven", 19.95);

prices.put("Car Vacuum", 24.95);

cout << prices.get("Toaster Oven") << endl;

operator[] needs to return a double&

prices["Car Vacuum"] = 24.95;

cout << prices["Toaster oven"] << endl;

Answer 1

 #include <bits/stdc++.h> using namespace std; int main() { map<string, double> prices{};// declaring associative array prices. prices["Car Vaccum"]=24.95; // Car Vaccum is the index or key and 24.95 is the value. prices["Toaster oven"]=32.75; cout << prices["Toaster oven"] << endl; cout << prices["Washing Machine"] << endl; // here washing machine is not declared in the associative array prices so this will print 0. }

Output

 32.75 0

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