chore: Add course material

397/SolutionEx71ABonus/main.cpp

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+// =================================================================
+// main.cpp (for pelican crossing program)
+// =================================================================
+
+#include "ConsolePoleVisitor.h"
+#include "Keyboard.h"
+#include "Pelican.h"
+#include "Pole.h"
+#include "PowerVisitor.h"
+#include "TimerSet.h"
+
+#include <cctype> // provides toupper()
+
+int main() {
+    Keyboard kbd;
+    Pelican thePelican;
+
+    Pole pole1(20, 0, thePelican);
+    thePelican.attach(pole1);
+    ConsolePoleVisitor cp1(pole1);
+    pole1.attach(cp1);
+
+    Pole pole2(40, 0, thePelican);
+    thePelican.attach(pole2);
+    ConsolePoleVisitor cp2(pole2);
+    pole2.attach(cp2);
+
+    char c = 0;
+
+    while (std::toupper(c) != 'Q') { // loop until 'Q' is pressed
+        c = kbd.getChar();           // get the character
+        if (c == ' ') {
+            // it's a space, so press the WAIT button
+            thePelican.press();
+        } else if (c == 'p') {
+            PowerVisitor pv;
+
+            pv.calculatePower(pole1);
+        }
+    }
+
+    return 0;
+}