STL Map Operations Added

CPP/stl/Maps Operations.cpp

@@ -0,0 +1,40 @@
+#include<iostream>
+#include<bits/stdc++.h>
+using namespace std;
+
+int main()
+{
+	//key,value pairs like dictionary in python
+	map<int,int>mp;
+	mp.insert(pair<int,int>(2,20));
+	mp.insert(pair<int,int>(3,10));
+
+	//mp[key]=value
+	mp[4]=80;
+
+	cout<<mp.size()<<endl;
+
+	for (auto it=mp.begin();it!=mp.end();it++)
+	{
+		cout<<it->first<<" "<<it->second<<endl;
+	}
+
+	//print value of any particular key in key value pair
+	cout<<mp[3]<<endl;
+
+	//to delete one key value pair enter the key name of the pair
+	mp.erase(2);
+	cout<<mp.size()<<endl;
+
+	mp.clear();
+	if(mp.empty())
+	{
+		cout<<"Yes"<<endl;
+	}
+	else
+	{
+		cout<<"No"<<endl;
+	}
+
+	return 0;
+}