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diff --git a/chapter14/blob.cxx b/chapter14/blob.cxx
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+// FILE: blob.cxx
+// This small demonstration shows how the organism class is used.
+#include <cstdlib>           // Provides EXIT_SUCCESS
+#include <iostream>          // Provides cout and cin
+#include "organism.h"        // Provides the organism class
+
+int main( )
+{
+    main_savitch_14::organism blob(20.0, 100000.0);
+    int week;
+
+    // Untroubled by conscience or intellect, the Blob grows for three weeks.
+    for (week = 1; week <= 3; ++week)
+    {
+        blob.simulate_week( );
+        cout << "Week " << week << ":" << " the Blob is ";
+        cout << blob.get_size( ) << " ounces." << endl;
+    }
+
+    // Steve McQueen reverses the growth rate to -80000 ounces per week.
+    blob.assign_rate(-80000.0);
+    while (blob.is_alive( ))
+    {
+        blob.simulate_week( );
+        cout << "Week " << week << ":" << " the Blob is ";
+        cout << blob.get_size( ) << " ounces." << endl;
+        ++week;
+    }
+
+    cout << "The Blob (or its son) shall return." << endl;
+    return EXIT_SUCCESS;
+}