Mega Code Archive
Cycle through the map in the reverse direction
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#include <iostream>
#include <string>
#include <map>
#include <utility>
using namespace std;
void show(const char *msg, map<string, string> mp);
int main() {
map<string, string> phonemap;
phonemap["A"] = "444-555-1234";
phonemap["B"] = "555-555-6576";
phonemap["C"] = "555-555-9843";
show("Here is the original map: ", phonemap);
phonemap["B"] = "555 555-5555";
cout << "New number: " << phonemap["B"] << endl;
// Cycle through the map in the reverse direction.
map<string, string>::reverse_iterator ritr;
cout << "Display phonemap in reverse order:" << endl;
for(ritr = phonemap.rbegin(); ritr != phonemap.rend(); ++ritr)
cout << ritr->first << ": " << ritr->second << endl;
return 0;
}
// Display the contents of a map<string, string> by using an iterator.
void show(const char *msg, map<string, string> mp) {
map<string, string>::iterator itr;
cout << msg << endl;
for(itr=mp.begin(); itr != mp.end(); ++itr)
cout << " " << itr->first << ": " << itr->second << endl;
cout << endl;
}
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