File and map : Map « Data Structure « C++

1. C++
2. Data Structure
3. Map

File and map

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

int main()
{
    map<string, int> hist;                                                  

    ifstream in( "inFile" );                                                

    string word;
    while ( in >> word )                                                    
    hist[ word ]++;                                                         

    in.close();                                                             

    typedef map<string, int>::const_iterator CI;                            
    for ( CI iter = hist.begin(); iter != hist.end(); ++iter )              
        cout << iter->first << '\t' << iter->second << endl;                
    return 0;
}

           
       

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2.	A map of opposites.
3.	A map of word opposites, using strings.
4.	Cycle through a map using an iterator.
5.	Cycle through a map in reverse.
6.	Using [] in Map
7.	[] automatically inserts elements.
8.	Maps can store only unique keys.
9.	Use a map to create a phone directory: string class
10.	Use the greater function object in Map
11.	Demonstrating a multimap.
12.	Use a multimap to create the phone directory.
13.	A simple map: char and int
14.	Use a map of strings to create a phone directory.