more exercises

7 files changed, 220 insertions, 0 deletions

diff --git a/2p39.cpp b/2p39.cpp
new file mode 100644
index 0000000..c608394
--- /dev/null
+++ b/2p39.cpp
@@ -0,0 +1,17 @@
+#include <iostream>
+
+
+/*
+ *
+ * 2.39
+ * 
+ *
+ */
+
+struct fff {/*...*/};
+
+int main () {
+
+	std::cout << "Remove semicolon after struct in file '2p39.cpp' and try compiling to see what the compiler says" << std::endl;
+	return 0;
+}
diff --git a/2p40.cpp b/2p40.cpp
new file mode 100644
index 0000000..2247529
--- /dev/null
+++ b/2p40.cpp
@@ -0,0 +1,28 @@
+#include <iostream>
+
+
+/*
+ *
+ * 2.40
+ * 
+ *
+ */
+
+struct SalesData {
+	std::string BookNo;
+	unsigned int UnitsSold = 0;
+	double Revenue = 0.0;
+};
+
+int main () {
+
+	struct SalesData Book;
+	Book.BookNo = "this is the BookNo";
+	Book.UnitsSold = 243;
+	Book.Revenue = 3294;
+	std::cout << Book.BookNo << "\n"
+			  << Book.UnitsSold << "\n"
+			  << Book.Revenue
+			  << std::endl;
+	return 0;
+}
diff --git a/2p41-1p20.cpp b/2p41-1p20.cpp
new file mode 100644
index 0000000..8cbd0b1
--- /dev/null
+++ b/2p41-1p20.cpp
@@ -0,0 +1,25 @@
+#include <iostream>
+#include "sales_item.hpp"
+
+/*
+ *
+ * 2.41 - 1.20
+ *
+ *
+ */
+
+struct SalesData {
+	std::string BookNo;
+	unsigned int UnitsSold = 0;
+	double Revenue = 0.0;
+};
+
+int main () {
+	
+	SalesData book1;
+	while(std::cin >> book1.BookNo >> book1.UnitsSold >> book1.Revenue) {
+		std::cout << book1.BookNo << " " << book1.UnitsSold << " " << book1.Revenue << std::endl;
+	}
+	
+	return 0;
+}
diff --git a/2p41-1p21-v1.cpp b/2p41-1p21-v1.cpp
new file mode 100644
index 0000000..be6e972
--- /dev/null
+++ b/2p41-1p21-v1.cpp
@@ -0,0 +1,32 @@
+#include <iostream>
+#include "sales_item.hpp"
+
+/*
+ *
+ * 2.41 - 1.21
+ *
+ *
+ */
+
+struct SalesData {
+	std::string BookNo;
+	unsigned int UnitsSold = 0;
+	double Revenue = 0.0;
+};
+
+int main () {
+	
+	SalesData book1;
+	SalesData book2;
+	while(std::cin >> book1.BookNo >> book1.UnitsSold >> book1.Revenue) {
+		std::cin >> book2.BookNo >> book2.UnitsSold >> book2.Revenue;
+		if(book1.BookNo != book2.BookNo) {
+			std::cout << "These books do not have the same ISBN" << std::endl;
+			continue;
+		}
+		
+		std::cout << book1.BookNo << " " << book1.UnitsSold + book2.UnitsSold << " " << book1.Revenue + book2.Revenue << std::endl;
+	}
+	
+	return 0;
+}
diff --git a/2p41-1p21-v2.cpp b/2p41-1p21-v2.cpp
new file mode 100644
index 0000000..248a059
--- /dev/null
+++ b/2p41-1p21-v2.cpp
@@ -0,0 +1,36 @@
+#include <iostream>
+#include "sales_item.hpp"
+
+/*
+ *
+ * 2.41 - 1.21
+ *
+ *
+ */
+
+struct SalesData {
+	std::string BookNo;
+	unsigned int UnitsSold = 0;
+	double Revenue = 0.0;
+};
+
+int main () {
+	
+	SalesData book1;
+	SalesData book2;
+	if(std::cin >> book1.BookNo >> book1.UnitsSold >> book1.Revenue) {
+		while(std::cin >> book2.BookNo >> book2.UnitsSold >> book2.Revenue) {
+			if(book1.BookNo != book2.BookNo) {
+				std::cout << "These books do not have the same ISBN" << std::endl;
+				continue;
+			}
+			
+			std::cout << book1.BookNo << " " << book1.UnitsSold + book2.UnitsSold << " " << book1.Revenue + book2.Revenue << std::endl;
+		}
+	} else {
+		std::cout << "Error!" << std::endl;
+		return -1;
+	}
+	
+	return 0;
+}
diff --git a/2p41-1p22-v1.cpp b/2p41-1p22-v1.cpp
new file mode 100644
index 0000000..95af902
--- /dev/null
+++ b/2p41-1p22-v1.cpp
@@ -0,0 +1,36 @@
+#include <iostream>
+#include "sales_item.hpp"
+
+/*
+ *
+ * 2.41 - 1.22
+ *
+ *
+ */
+
+struct SalesData {
+	std::string BookNo;
+	unsigned int UnitsSold = 0;
+	double Revenue = 0.0;
+};
+
+int main () {
+	
+	SalesData book1;
+	SalesData Sum;
+	if(std::cin >> Sum.BookNo >> Sum.UnitsSold >> Sum.Revenue) {
+		while(std::cin >> book1.BookNo >> book1.UnitsSold >> book1.Revenue) {
+			if(Sum.BookNo == book1.BookNo) {
+				Sum.UnitsSold += book1.UnitsSold;
+				Sum.Revenue += book1.Revenue;
+			} else {
+				std::cout << "These books do not have the same ISBN" << std::endl;
+				return -1;
+			}
+		}
+	}
+	
+	std::cout << Sum.BookNo << " " << Sum.UnitsSold << " " << Sum.Revenue << std::endl;
+	
+	return 0;
+}
diff --git a/2p41-1p22-v2.cpp b/2p41-1p22-v2.cpp
new file mode 100644
index 0000000..25a49bd
--- /dev/null
+++ b/2p41-1p22-v2.cpp
@@ -0,0 +1,46 @@
+#include <iostream>
+#include "sales_item.hpp"
+
+/*
+ *
+ * 2.41 - 1.22
+ * version 2, a bit more interactive but might not be desirable if using file redirections
+ *
+ */
+
+struct SalesData {
+	std::string BookNo;
+	unsigned int UnitsSold = 0;
+	double Revenue = 0.0;
+};
+
+int main () {
+	
+	SalesData book1;
+	SalesData Sum;
+	if(std::cin >> Sum.BookNo >> Sum.UnitsSold >> Sum.Revenue) {
+		while(std::cin >> book1.BookNo >> book1.UnitsSold >> book1.Revenue) {
+			if(Sum.BookNo == book1.BookNo) {
+				Sum.UnitsSold += book1.UnitsSold;
+				Sum.Revenue += book1.Revenue;
+			} else {
+				std::cout << "These books do not have the same ISBN" << std::endl;
+				while(1) {
+					std::string yesno;
+					std::cout << "Do you wish to continue? Yes/No " << std::endl;
+					std::cin >> yesno;
+					if(yesno == "Yes") {
+						break;
+					} else if(yesno == "No") {
+						return 0;
+				    }
+				}
+				continue;
+			}
+		}
+	}
+	
+	std::cout << Sum.BookNo << " " << Sum.UnitsSold << " " << Sum.Revenue << std::endl;
+	
+	return 0;
+}