add solution for lab07

labs/maps/phonebook2.cpp

@@ -0,0 +1,42 @@
+#include <iostream>
+#include <map>
+#include <string>
+using namespace std;
+
+// Add a number, name pair to the phonebook using a map.
+void add(map<int, string>& phonebook, int number, const string &name) {
+    map<int, string>::iterator it = phonebook.find(number);
+    if (it != phonebook.end()) {
+        it->second = name;
+    } else {
+        phonebook.insert(pair<int, string>(number, name));
+    }
+}
+
+// Given a phone number, determine who is calling.
+void identify(const map<int, string>& phonebook, int number) {
+    map<int, string>::const_iterator it = phonebook.find(number);
+    if (it == phonebook.end())
+        cout << "unknown caller!" << endl;
+    else
+        cout << it->second << " is calling!" << endl;
+}
+
+int main() {
+    // Init
+    map<int, string> phonebook;
+
+    // Add
+    add(phonebook, 1111, "fred");
+    add(phonebook, 2222, "sally");
+    add(phonebook, 3333, "george");
+    add(phonebook, 1234567, "alice");
+    add(phonebook, 7654321, "bob");
+
+    // Test
+    identify(phonebook, 2222);
+    identify(phonebook, 4444);
+    identify(phonebook, 1234567);
+    
+    return 0;
+}