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  1. #include<iostream>  
  2. #include<map>  
  3. #include<string> 
  4. #include<utility>
  5. using namespace std; 
  6. int main()  
  7. {  
  8.   	typedef map<string,int>mapType;  
  9.  mapType populationMap;  
  10.  
  11.  populationMap.insert(pair<string,int>("Maharashtra",7026357));  
  12.  populationMap.insert(pair<string,int>("Rajasthan",6578936));
  13.  populationMap.insert(pair<string,int>("Karnataka",6678993));
  14.  populationMap.insert(pair<string,int>("Punjab",5789032));
  15.  populationMap.insert(pair<string,int>("West Bengal",6676291));
  16.  mapType::iterator iter;  
  17.   	cout<<"====Population of states in India====";  
  18.  cout<<"\nSize of populationMap:"<<populationMap.size()<<"\n";  
  19.   	string state_name; 
  20.   	cout<<"\n Enter name of the state"; 
  21. cin>>state_name;
  22. iter=populationMap.find(state_name);
  23. if(iter!=populationMap.end())  
  24.   	  	cout<<state_name<<"s population is"<<iter->second;  
  25.   	else  
  26.   	  	cout<<"Key is not in populationMap\n";  
  27.   	  	populationMap.clear();  
  28. }  
  29.  
  30.  
  31.  
Success #stdin #stdout 0s 5268KB
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stdin
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Standard input is empty
stdout
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====Population of states in India====
Size of populationMap:5

 Enter name of the stateKey is not in populationMap
https://ideone.com/DzyDvb
language:
C++ (gcc 8.3)
created:
3 days ago
visibility:
public

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