map.cpp

#include <iostream>
#include <map>
#include <string>
#include <cstdlib>
using namespace std;
int main()
{
    map<char,int> mp;
    map<char, int>::iterator it;
    int choice, item;
    char s;
    while (1)
    {
        cout<<"\n---------------------"<<endl;
        cout<<"Map Implementation in Stl"<<endl;
        cout<<"\n---------------------"<<endl;
        cout<<"1.Insert Element into the Map"<<endl;
        cout<<"2.Delete Element of the Map"<<endl;
	    cout<<"3.Size of the Map"<<endl;
        cout<<"4.Find Element at a key in Map"<<endl;
        cout<<"5.Dislplay by Iterator"<<endl;
        cout<<"6.Count Elements at a specific key"<<endl;
        cout<<"7.Exit"<<endl;
        cout<<"Enter your Choice: ";
        cin>>choice;
        switch(choice)
        {
        case 1:
            cout<<"Enter value to be inserted: ";
            cin>>item;
            cout<<"Enter the key: ";
            cin>>s;
            mp.insert(pair<char,int>(s  ,item));
            break;
        case 2:
            cout<<"Enter the mapped string to be deleted: ";
            cin>>s;
            mp.erase(s);
            break;
        case 3:
	    cout<<"Size of Map: ";
	    cout<<mp.size()<<endl;
            break;
        case 4:
	    cout<<"Enter the key at which value to be found: ";
            cin>>s;
            if (mp.count(s) != 0)
                cout<<mp.find(s)->second<<endl;
            else
                cout<<"No Element Found"<<endl;
            break;
        case 5:
	    cout<<"Displaying Map by Iterator: ";
            for (it = mp.begin(); it != mp.end(); it++)
            {
                cout << (*it).first << ": " << (*it).second << endl;
            }
            break;
        case 6:
            cout<<"Enter the key at which number of values to be counted: ";
            cin>>s;
            cout<<mp.count(s)<<endl;
            break;
	case 7:
            exit(1);
	    break;
        default:
            cout<<"Wrong Choice"<<endl;
        }
    }
    return 0;
}