From 60789ab73d4987068114b0342e71a63f81f65c68 Mon Sep 17 00:00:00 2001
From: Oskar <open7software@gmail.com>
Date: Fri, 6 Sep 2024 10:33:29 +0200
Subject: more

---
 6p11.cpp | 22 ++++++++++++++++++++++
 6p12.cpp | 25 +++++++++++++++++++++++++
 6p13.cpp | 16 ++++++++++++++++
 6p14.cpp | 18 ++++++++++++++++++
 6p15.cpp | 35 +++++++++++++++++++++++++++++++++++
 5 files changed, 116 insertions(+)
 create mode 100644 6p11.cpp
 create mode 100644 6p12.cpp
 create mode 100644 6p13.cpp
 create mode 100644 6p14.cpp
 create mode 100644 6p15.cpp

diff --git a/6p11.cpp b/6p11.cpp
new file mode 100644
index 0000000..6e37076
--- /dev/null
+++ b/6p11.cpp
@@ -0,0 +1,22 @@
+#include <iostream>
+
+/*
+ *
+ * 6.11
+ *
+ *
+ */
+
+void resettozero(int &i) {
+
+	i = 0;
+}
+
+int main () {
+
+	int i = 2132;
+	std::cout << i << std::endl;
+	resettozero(i);
+	std::cout << i << std::endl;
+	return 0;
+}
diff --git a/6p12.cpp b/6p12.cpp
new file mode 100644
index 0000000..2453e76
--- /dev/null
+++ b/6p12.cpp
@@ -0,0 +1,25 @@
+#include <iostream>
+
+/*
+ *
+ * 6.12
+ *
+ *
+ */
+
+void intswapperREF(int &i1, int &i2) {
+
+	int tmp1 = i1;
+	i1 = i2;
+	i2 = tmp1;
+}
+
+int main () {
+	
+	int i1 = 121212;
+	int i2 = 323;
+	std::cout << i1 << " " << i2 << std::endl;
+	intswapperREF(i1, i2);
+	std::cout << i1 << " " << i2 << std::endl;
+	return 0;
+}
diff --git a/6p13.cpp b/6p13.cpp
new file mode 100644
index 0000000..e6cc1e7
--- /dev/null
+++ b/6p13.cpp
@@ -0,0 +1,16 @@
+
+/*
+ *
+ * 6.13
+ *
+ *
+ */
+
+int main () {
+
+	//void f(T): It means that the variable is copied from the arguments passed to the function
+	//void f(T&): It means that the variable is a reference to the variable passed to the function.
+	// So basically, when we use the variable in the function it is directly a reference to the variable
+	// that we passed so that variable is changed rather than a copy
+	return 0;
+}
diff --git a/6p14.cpp b/6p14.cpp
new file mode 100644
index 0000000..f391697
--- /dev/null
+++ b/6p14.cpp
@@ -0,0 +1,18 @@
+
+/*
+ *
+ * 6.14
+ *
+ *
+ */
+
+int main () {
+
+	// It should be a reference when we just want read access to the object and we aren't changing it, we dont have to copy it
+	// It should be a reference when we want to change the object outside of the function
+	// It could also be a reference when the object is a type that holds a lot of data and maybe it matters a lot for performance
+	// If we want to return more information than just one object we could return information through a reference
+	
+	// It should not be a reference when we want to change the object inside the function but not outside it
+	return 0;
+}
diff --git a/6p15.cpp b/6p15.cpp
new file mode 100644
index 0000000..be65157
--- /dev/null
+++ b/6p15.cpp
@@ -0,0 +1,35 @@
+
+/*
+ *
+ * 6.15
+ *
+ *
+ */
+
+int main () {
+
+	/*
+	  Why is s a reference to const?
+	  Because we just need read access to it, we are checking the size
+	  
+	  Why is occurs a plain reference?
+	  Because we want to return information through occurs so we need write access
+	  
+	  Why is c not a reference?
+	  'c' is the character we are looking for. I suspect it's not a reference because
+	  if we accidentally change c then we could have some serious bugs. It would probably
+	  be fine if we did const reference to char but it really does not matter much.
+	  
+	  What if we made s a plain reference?
+	  I don't think it would matter much with the function as it is right now but it would
+	  make it so if someone modifies the function, they could make a mistake and somehow
+	  change the contents of 's'. Because we have const reference we ensure that we can only
+	  read and not write.
+	  
+	  What if we made occurs a reference to const?
+	  The function would not work and perhaps not even compile. We would not be able to return
+	  the information through the reference
+	  
+	 */
+	return 0;
+}
-- 
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