From 38e3c732d86165a84cd872e96e10ca1e811f2bb1 Mon Sep 17 00:00:00 2001
From: Oskar <open7software@gmail.com>
Date: Thu, 15 Aug 2024 18:16:33 +0200
Subject: more exercises

---
 3p43.cpp           | 35 +++++++++++++++++++++++++++++++++++
 3p44.cpp           | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 3p45.cpp           | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 multi-arr-test.cpp |  3 +++
 4 files changed, 139 insertions(+)
 create mode 100644 3p44.cpp
 create mode 100644 3p45.cpp

diff --git a/3p43.cpp b/3p43.cpp
index a766d56..19fa0ce 100644
--- a/3p43.cpp
+++ b/3p43.cpp
@@ -2,6 +2,7 @@
 #include <vector>
 #include "sales_data.hpp"
 #include "sales_item.hpp"
+#include <iterator>
 
 /*
  *
@@ -11,5 +12,39 @@
  */
 
 int main () {
+
+	int ia[3][4] = {
+		{1,2,3,4},
+		{5,6,7,8},
+		{9,10,11,12}
+	};
+
+	for (int (&a)[4] : ia) { // A reference to an array of 4 int's
+		// I'll be honest i would not have figured that out myself, i did search the internet for answers.
+		for (int aa : a) {
+			std::cout << aa << " ";
+		}
+		
+		std::cout << std::endl;
+	}
+
+	std::cout << std::endl;
+	for(size_t i = 0 ; i != 3 ; ++i) {
+		for(size_t j = 0 ; j != 4 ; ++j) {
+			std::cout << ia[i][j] << " ";
+		}
+		
+		std::cout << std::endl;
+	}
+
+	std::cout << std::endl;
+	for(int (*p)[4] = std::begin(ia) ; p != std::end(ia) ; ++p) {
+		for(int *pp = std::begin(*p) ; pp != std::end(*p) ; ++pp) {
+			std::cout << *pp << " ";
+		}
+
+		std::cout << std::endl;
+	}
+
 	return 0;
 }
diff --git a/3p44.cpp b/3p44.cpp
new file mode 100644
index 0000000..f098169
--- /dev/null
+++ b/3p44.cpp
@@ -0,0 +1,52 @@
+#include <iostream>
+#include <vector>
+#include "sales_data.hpp"
+#include "sales_item.hpp"
+#include <iterator>
+
+/*
+ *
+ * 3.44
+ *
+ *
+ */
+
+int main () {
+
+	int ia[3][4] = {
+		{1,2,3,4},
+		{5,6,7,8},
+		{9,10,11,12}
+	};
+
+	using int_arr4 = int[4]; // I'll be honest i dont like this whole 'using' and 'typedef'
+	                         // It just feels like obfuscating the code when you really don't need to.
+	for (int_arr4 &a : ia) { // A reference to an array of 4 int's
+		// I'll be honest i would not have figured that out myself, i did search the internet for answers.
+		for (int aa : a) {
+			std::cout << aa << " ";
+		}
+		
+		std::cout << std::endl;
+	}
+
+	std::cout << std::endl;
+	for(size_t i = 0 ; i != 3 ; ++i) {
+		for(size_t j = 0 ; j != 4 ; ++j) {
+			std::cout << ia[i][j] << " ";
+		}
+		
+		std::cout << std::endl;
+	}
+
+	std::cout << std::endl;
+	for(int_arr4 *p = std::begin(ia) ; p != std::end(ia) ; ++p) {
+		for(int *pp = std::begin(*p) ; pp != std::end(*p) ; ++pp) {
+			std::cout << *pp << " ";
+		}
+
+		std::cout << std::endl;
+	}
+
+	return 0;
+}
diff --git a/3p45.cpp b/3p45.cpp
new file mode 100644
index 0000000..0116a88
--- /dev/null
+++ b/3p45.cpp
@@ -0,0 +1,49 @@
+#include <iostream>
+#include <vector>
+#include "sales_data.hpp"
+#include "sales_item.hpp"
+#include <iterator>
+
+/*
+ *
+ * 3.45
+ *
+ *
+ */
+
+int main () {
+
+	int ia[3][4] = {
+		{1,2,3,4},
+		{5,6,7,8},
+		{9,10,11,12}
+	};
+
+	for (auto &a : ia) {
+		for (auto aa : a) {
+			std::cout << aa << " ";
+		}
+		
+		std::cout << std::endl;
+	}
+
+	std::cout << std::endl;
+	for(size_t i = 0 ; i != 3 ; ++i) {
+		for(size_t j = 0 ; j != 4 ; ++j) {
+			std::cout << ia[i][j] << " ";
+		}
+		
+		std::cout << std::endl;
+	}
+
+	std::cout << std::endl;
+	for(auto p = std::begin(ia) ; p != std::end(ia) ; ++p) {
+		for(auto pp = std::begin(*p) ; pp != std::end(*p) ; ++pp) {
+			std::cout << *pp << " ";
+		}
+
+		std::cout << std::endl;
+	}
+
+	return 0;
+}
diff --git a/multi-arr-test.cpp b/multi-arr-test.cpp
index bdd5306..9abf500 100644
--- a/multi-arr-test.cpp
+++ b/multi-arr-test.cpp
@@ -25,6 +25,7 @@ int main () {
 		for(auto b : a) {
 			std::cout << b << " ";
 		}
+		
 		std::cout << std::endl;
 	}
 
@@ -42,6 +43,7 @@ int main () {
 		for(auto b : a) {
 			std::cout << b << " ";
 		}
+		
 		std::cout << std::endl;
 	}
 	
@@ -50,6 +52,7 @@ int main () {
 		for(auto aa = std::begin(*a) ; aa != std::end(*a) ; ++aa) {
 			std::cout << *aa << " ";
 		}
+		
 		std::cout << std::endl;
 	}
 	
-- 
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