Source of map01.cpp

Structures and functions

  1: //map01.cpp

  3: #include <iostream>
  4: #include <map>
  5: using namespace std;

  7: int main()
  8: {
  9:     cout << "\nThis program creates an empty map, places three "
 10:         "key/value pairs into it,\nthen displays the values by "
 11:         "accessing them via their keys.";
 12:     cout << "\nPress Enter to continue ... ";  cin.ignore(80, '\n');

 14:     map<char, int> m;
 15:     if (m.empty())
 16:         cout << "\nThe newly created map is currently empty.";
 17:     cout << "\nPress Enter to continue ... ";  cin.ignore(80, '\n');

 19:     m['A'] = 65;
 20:     m['B'] = 66;
 21:     m['C'] = 67;
 22:     cout << "\nAfter entering the three key/value pairs, the size of "
 23:         "the map is now " << m.size() << ".";
 24:     cout << "\nPress Enter to continue ... ";  cin.ignore(80, '\n');

 26:     cout << "\nIf the component key is A, the component value is "
 27:         << m['A'] << ".";
 28:     cout << "\nIf the component key is B, the component value is "
 29:         << m['B'] << ".";
 30:     cout << "\nIf the component key is C, the component value is "
 31:         << m['C'] << ".";
 32:     cout << "\nPress Enter to continue ... ";  cin.ignore(80, '\n');
 33: }