Maps
A stores elements that contain both a 'key' and a 'value'. An elements key is used to locate the element in the map, and the value holds the information for that key. By default maps are ordered sequentially by their key. A reference to all of its member functions can be found here: http://www.cplusplus.com/reference/map/map/
Ex Code
#include <iostream>
#include <map>
#include <iterator>
#include <string>
using namespace std;
void map_ex() {
map<string, int> students;
cout << "MAP ITERATORS\n";
students.emplace("Zach", 88);
students.emplace("Mary", 93);
students.emplace("Will", 74);
students.emplace("Ari", 81);
cout << "\nIterate through each element\n";
map<string, int>::iterator itr;
for(itr = students.begin(); itr != students.end(); ++itr) {
/* 'first' refers to the key /
/ 'second' refers to the value */
cout << itr->first << " : " << itr->second << endl;
}
}
int main() {
map_ex();
return 0;
}
Output
MAP ITERATORS
Iterate through each element
Ari : 81
Mary : 93
Will : 74
Zach : 88