5 files changed, 138 insertions, 0 deletions
diff --git a/7p52.cpp b/7p52.cpp
new file mode 100644
index 0000000..be826e7
--- /dev/null
+++ b/7p52.cpp
@@ -0,0 +1,27 @@
+#include <iostream>
+
+/*
+ *
+ * 7.52
+ *
+ *
+ */
+
+struct Sales_data {
+	std::string bookNo;
+	unsigned units_sold = 0;
+	double revenue = 0.0;
+};
+
+int main () {
+
+	Sales_data item = {"978-0590353403", 25, 15.99};
+	std::cout << item.bookNo << "\n"
+			  << item.units_sold << "\n"
+			  << item.revenue << std::endl;
+
+	// There seems to be no issues
+	// Apparently it refuses to compile if we were to use C++11
+	// I am currently on C++20
+	return 0;
+}
diff --git a/7p53.cpp b/7p53.cpp
new file mode 100644
index 0000000..2c6c194
--- /dev/null
+++ b/7p53.cpp
@@ -0,0 +1,39 @@
+#include <iostream>
+
+/*
+ *
+ * 7.53
+ *
+ *
+ */
+
+class Debug {
+public:
+	constexpr Debug(): hardware(false), inputoutput(false), other(false) {}
+	constexpr Debug(bool a, bool b, bool c): hardware(a), inputoutput(b), other(c) {}
+	constexpr void SetHW(bool a) { hardware = a; }
+	constexpr void SetIO(bool a) { inputoutput = a; }
+	constexpr void SetO(bool a) { other = a; }
+	constexpr bool GetHW() const { return hardware; }
+	constexpr bool GetIO() const { return inputoutput; }
+	constexpr bool GetO() const { return other; }
+private:
+	bool hardware;
+	bool inputoutput;
+	bool other;
+};
+
+int main () {
+
+	Debug D1;
+	Debug Derrors(true, true, true);
+	std::cout << D1.GetHW() << " " << D1.GetIO() << " " << D1.GetO() << std::endl;
+	D1.SetHW(true);
+	std::cout << D1.GetHW() << " " << D1.GetIO() << " " << D1.GetO() << std::endl;
+	std::cout << Derrors.GetHW() << " " << Derrors.GetIO() << " " << Derrors.GetO() << std::endl;
+	D1 = Derrors;
+	std::cout << D1.GetHW() << " " << D1.GetIO() << " " << D1.GetO() << std::endl;
+	constexpr Debug D2(true, false, true);
+	std::cout << D2.GetHW() << " " << D2.GetIO() << " " << D2.GetO() << std::endl;
+	return 0;
+}
diff --git a/7p54.cpp b/7p54.cpp
new file mode 100644
index 0000000..d8606c4
--- /dev/null
+++ b/7p54.cpp
@@ -0,0 +1,19 @@
+
+/*
+ *
+ * 7.54
+ *
+ *
+ */
+
+int main () {
+
+	/*
+	  Answer: Yes and No.
+
+	  C++11 did not allow this
+	  When compiling with C++20, this is allowed.
+
+	 */
+	return 0;
+}
diff --git a/7p55.cpp b/7p55.cpp
new file mode 100644
index 0000000..c8a7f96
--- /dev/null
+++ b/7p55.cpp
@@ -0,0 +1,13 @@
+
+/*
+ *
+ * 7.55
+ *
+ *
+ */
+
+int main () {
+
+	// No
+	return 0;
+}
diff --git a/constructor-constexpr-test.cpp b/constructor-constexpr-test.cpp
new file mode 100644
index 0000000..ee2a06e
--- /dev/null
+++ b/constructor-constexpr-test.cpp
@@ -0,0 +1,40 @@
+#include <iostream>
+
+/*
+ *
+ * 
+ *
+ *
+ */
+
+class Debug {
+public:
+	constexpr Debug(bool b = true): hw(b), io(b), other(b) { }
+	constexpr Debug(bool h, bool i, bool o):
+		hw(h), io(i), other(o) { }
+	
+	constexpr bool any() { return hw || io || other; }
+	void set_io(bool b) { io = b; }
+	void set_hw(bool b) { hw = b; }
+	void set_other(bool b) { hw = b; }
+	void printDbg() { std::cout << hw << "\n" << io << "\n" << other << std::endl; }
+private:
+	bool hw;
+	// hardware errors other than IO errors
+	bool io;
+	// IO errors
+	bool other; // other errors
+};
+
+int main () {
+
+	/*
+	  From page 299-300, i just needed to confirm what the code is doing.
+	 */
+	Debug d1;
+	Debug d2(true, true, false);
+	d1.printDbg();
+	std::cout << "------" << std::endl;
+	d2.printDbg();
+	return 0;
+}