#include <iostream>
#include <map>
 
int main (void) {
    std::map<char,char> mymap;
    std::map<char,char>::iterator it;
 
    mymap['a'] = 'A'; mymap['b'] = 'B'; mymap['c'] = 'C';
    mymap['d'] = 'D'; mymap['e'] = 'E'; mymap['f'] = 'F';
    mymap['g'] = 'G'; mymap['h'] = 'H'; mymap['i'] = 'I';
 
    it = mymap.find ('b');             // by iterator (b), leaves acdefghi.
    mymap.erase (it);
 
    it = mymap.find ('e');             // by range (e-i), leaves acd.
    mymap.erase (it, mymap.end());
 
    mymap.erase ('a');                 // by key (a), leaves cd.
 
    mymap.erase ('z');                 // invalid key (none), leaves cd.
 
    for (it = mymap.begin(); it != mymap.end(); it++)
        std::cout << (*it).first << " => " << (*it).second << '\n';
 
    return 0;
}

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