update chapter16 codes

Author: chuckbruno

chapter14/.DS_Store

@@ -82,4 +82,4 @@ class BadDude: public Gunslinger, public PokerPlayer
         void Set();
 };
 
-#endif
+#endif

chapter14/assignment/.DS_Store

@@ -0,0 +1,112 @@
+#include <iostream>
+#include <cmath>
+#include <string>
+#include "exc_mean.h"
+
+
+class demo
+{
+    private:
+        std::string word;
+    public:
+        demo(const std::string & str)
+        {
+            word = str;
+            std::cout << "demo " << word << " created" << std::endl;
+        }
+
+        ~demo()
+        {
+            std::cout << "demo " << word << " destoryed" << std::endl;
+        }
+
+        void show() const
+        {
+            std::cout << "demo " << word << " lives!" << std::endl;
+        }
+};
+
+double hmean(double a, double b);
+double gmean(double a, double b);
+double means(double a, double b);
+
+
+int main()
+{
+    using std::cout;
+    using std::cin;
+    using std::endl;
+
+    double x, y, z;
+    {
+        demo d1("found in block in main()");
+        cout << "Enter two numbers: ";
+        while(cin >> x >> y)
+        {
+            try{
+                z = means(x, y);
+                cout << "The mean mean of " << x << " and " << y << " is " << z << endl;
+                cout << "Enter next pair: ";
+            }
+            catch(bad_hmean & bg)
+            {
+                bg.mesg();
+                cout << "Try again. \n";
+                continue;
+            }
+            catch(bad_gmean & hg)
+            {
+                cout << hg.mesg();
+                cout << "Values used: " << hg.v1 << ", " << hg.v2 << endl;
+                cout << "Sorry, you don't get to play any more." << endl;
+                break;
+            }
+        }
+
+        d1.show();
+    }
+
+    cout << "Bye!" << endl;
+    cin.get();
+    cin.get();
+    return 0;
+
+}
+
+
+double hmean(double a, double b)
+{
+    if (a == -b)
+        throw bad_hmean(a, b);
+    return 2.0 * a * b / (a + b);
+}
+
+
+double gmean(double a, double b)
+{
+    if (a < 0 || b < 0)
+        throw bad_gmean(a, b);
+    return std::sqrt(a * b);
+}
+
+
+double means(double a, double b)
+{
+    double am, hm, gm;
+    demo d2("found in means()");
+    am = (a + b) / 2.0;
+    try
+    {
+        hm = hmean(a, b);
+        gm = gmean(a, b);
+    }
+    catch (bad_hmean & bg)
+    {
+        bg.mesg();
+        std::cout << "Caught in means()" << std::endl;
+        throw;
+    }
+
+    d2.show();
+    return (am + hm + gm) / 3.0;
+}

chapter14/assignment/14.7.4assign.h

@@ -0,0 +1,79 @@
+#include <iostream>
+#include <cstdlib>
+#include <ctime>
+
+
+using std::cout;
+
+class Grand
+{
+    private:
+        int hold;
+    public:
+        Grand(int h = 0): hold(h) {}
+        virtual void Speak() const {cout << "I'm a grand class!\n";}
+        virtual int Value() const {return hold; }
+
+};
+
+
+class Superb: public Grand
+{
+    public:
+        Superb(int h = 0): Grand(h) {}
+        void Speak() const { cout << "I am a superb class!!\n"; }
+        virtual void Say() const
+            {cout << "I hold the superb value of " << Value() << "!\n";}
+
+};
+
+
+class Magnificent: public Superb
+{
+    private:
+        char ch;
+    public:
+        Magnificent(int h = 0, char c = 'A'): Superb(h), ch(c){}
+        void Speak() const {cout << "I an a magnificent class !!!\n";}
+        void Say() const { cout << "I hold the character " << ch << " and the integer " << Value() << "!\n"; }
+};
+
+
+Grand * GetOne();
+
+int main()
+{
+    std::srand(std::time(0));
+    Grand * pg;
+    Superb * ps;
+    for(int i = 0; i < 5; i++)
+    {
+        pg = GetOne();
+        pg->Speak();
+        if (ps = dynamic_cast<Superb * > (pg))
+            ps->Say();
+    }
+
+    return 0;
+}
+
+
+Grand * GetOne()
+{
+    Grand * p;
+    switch(std::rand() % 3)
+    {
+        case 0:
+            p = new Grand(std::rand() % 100);
+            break;
+        case 1:
+            p = new Superb(std::rand() % 100);
+            break;
+        case 2:
+            p = new Magnificent(std::rand() % 100, 'A' + std::rand() % 26);
+            break;
+
+    }
+
+    return p;
+}

chapter15/context/15.12error5.cpp

@@ -0,0 +1,83 @@
+#include <iostream>
+#include <cstdlib>
+#include <ctime>
+#include <typeinfo>
+
+
+using std::cout;
+
+class Grand
+{
+    private:
+        int hold;
+    public:
+        Grand(int h = 0): hold(h) {}
+        virtual void Speak() const {cout << "I'm a grand class!\n";}
+        virtual int Value() const {return hold; }
+
+};
+
+
+class Superb: public Grand
+{
+    public:
+        Superb(int h = 0): Grand(h) {}
+        void Speak() const { cout << "I am a superb class!!\n"; }
+        virtual void Say() const
+            {cout << "I hold the superb value of " << Value() << "!\n";}
+
+};
+
+
+class Magnificent: public Superb
+{
+    private:
+        char ch;
+    public:
+        Magnificent(int h = 0, char c = 'A'): Superb(h), ch(c){}
+        void Speak() const {cout << "I an a magnificent class !!!\n";}
+        void Say() const { cout << "I hold the character " << ch << " and the integer " << Value() << "!\n"; }
+};
+
+
+Grand * GetOne();
+
+int main()
+{
+    std::srand(std::time(0));
+    Grand * pg;
+    Superb * ps;
+    for(int i = 0; i < 5; i++)
+    {
+        pg = GetOne();
+        std::cout << "Now processing type " << typeid(*pg).name() << ".\n";
+        pg->Speak();
+        if (ps = dynamic_cast<Superb * > (pg))
+            ps->Say();
+        if(typeid(Magnificent) == typeid(*pg))
+            std::cout << "Yes, you're really magnificent.\n";
+    }
+
+    return 0;
+}
+
+
+Grand * GetOne()
+{
+    Grand * p;
+    switch(std::rand() % 3)
+    {
+        case 0:
+            p = new Grand(std::rand() % 100);
+            break;
+        case 1:
+            p = new Superb(std::rand() % 100);
+            break;
+        case 2:
+            p = new Magnificent(std::rand() % 100, 'A' + std::rand() % 26);
+            break;
+
+    }
+
+    return p;
+}

chapter15/context/15.17rtti1.cpp

@@ -0,0 +1,27 @@
+#include <iostream>
+
+using std::cout;
+using std::endl;
+
+void change(const int * pt, int n);
+
+
+int main()
+{
+    int pop1 = 38282;
+    const int pop2 = 2000;
+
+    cout << "pop1, pop2: " << pop1 << ", " << pop2 << endl;
+    change(&pop1, -103);
+    change(&pop2, -103);
+
+    cout << "pop1, pop2: " << pop1 << ", " << pop2 << endl;
+}
+
+
+void change(const int * pt, int n)
+{
+    int *pc;
+    pc = const_cast<int *>(pt);
+    *pc += n;
+}

chapter15/context/15.18rtti2.cpp

@@ -0,0 +1,60 @@
+#include <iostream>
+#include "15.1tv.h"
+
+
+bool Tv::volup()
+{
+    if(volume < MaxVal)
+    {
+        volume++;
+        return true;
+    }
+    else
+        return false;
+}
+
+
+bool Tv::voldown()
+{
+    if(volume > MinVal)
+    {
+        volume--;
+        return true;
+    }
+    else
+        return false;
+}
+
+void Tv::chanup()
+{
+    if(channel < maxchannel)
+        channel++;
+    else
+        channel = 1;
+}
+
+
+void Tv::chandown()
+{
+    if(channel > 1)
+        channel--;
+    else
+        channel = maxchannel;
+}
+
+
+void Tv::settings() const
+{
+    using std::cout;
+    using std::endl;
+
+    cout << "Tv is " << (state == Off ? "Off": "On") << endl;
+
+    if(state == On)
+    {
+        cout << "Volume setting = " << volume << endl;
+        cout << "Channel setting = " << channel << endl;
+        cout << "Mode = " << (mode == Antenna ? "antenna": "cable") << endl;
+        cout << "Input = " << (input == TV ? "TV": "DVD") << endl;
+    }
+}