Missing from Guide

These two are missing from the guide

ch17/17_25.cpp

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+//exercise 17.25
+//Rewrite your phone program so that it writes only the first phone number for each person
+
+#include <iostream>
+#include <regex>
+#include <string>
+
+using namespace std;
+
+string pattern = "(\\()?(\\d{3})(\\))?([-. ])?(\\d{3})([-. ])?(\\d{4})";
+string fmt = "$2.$5.$7";
+regex r(pattern);
+string s;
+
+int main()
+{
+    while(getline(cin,s))
+    {
+        smatch result;
+        regex_search(s,result,r);
+        if(!result.empty())
+        {
+        cout<<result.prefix()<<result.format(fmt)<<endl;
+        }
+        else
+        {
+            cout<<"Sorry, No match."<<endl;
+        }
+    }
+
+    return 0;
+}

ch17/17_27.cpp

@@ -0,0 +1,35 @@
+//exercise 17.27
+//Write a program that reformats a nine-digit zip code as ddddd-dddd.
+
+#include <iostream>
+#include <regex>
+#include <string>
+
+using namespace std;
+
+string pattern = "(\\d{5})([.- ])?(\\d{4})";
+string fmt = "$1-$3";
+
+regex r(pattern);
+string s;
+
+
+int main()
+{
+    while(getline(cin,s))
+    {
+        smatch result;
+        regex_search(s,result, r);
+
+        if(!result.empty())
+        {
+            cout<<result.format(fmt)<<endl;
+        }
+        else
+        {
+            cout<<"Sorry, No match."<<endl;
+        }
+
+    }
+    return 0;
+}