Cpp > Programs

cpp map , template using product example

#include <iostream>
#include <string>
#include <map>
using namespace std;

class Product
{
public:
Product():mName("New Product"), mStockLevel(0), mPrice(0) {}
   Product(string newName, double newPrice = 0, int newStockLevel = 0):
mName(newName), mPrice(newPrice), mStockLevel(newStockLevel) {}

void setName(string newName) { mName       = newName;       }
void setName(int newStockLevel) { mStockLevel = newStockLevel; }
void setPrice(double newPrice) { mPrice      = newPrice;      }

string getName() const { return mName;       }
int getStockLevel() const { return mStockLevel; }
double getPrice() const { return mPrice;      }

friend ostream& operator<<(ostream& os, const Product& p)
{
os << "Product: " << p.mName
<< "\tPrice: " << p.mPrice
<< "\tStock on hand: " << p.mStockLevel;
return os;
}

private:
string mName;
int mStockLevel;
double mPrice;
};

// template function to show all elements in a map
template<class T, class A>
void showMap(const map<T, A>& m);

int main()
{
Product Pen("Pen", 5.99, 58);
Product Lamp("Lamp", 28.49, 24);
Product Speaker("Speaker", 24.95, 40);

map<string, Product> productMap;
productMap[Pen.getName()] = Pen;
productMap[Lamp.getName()] = Lamp;
productMap[Speaker.getName()] = Speaker;

showMap(productMap);
return 0;
}

//
// Show map elements
//
template<class T, class A>
void showMap(const map<T, A>& m)
{
cout << "Map elements:\n";
for (map<T, A>::const_iterator ci = m.begin(); ci != m.end(); ++ci)
cout << ci->first << "\t" << ci->second << "\n";

cout << "\n\n";
}