From 6d33273f62fb78c481babeda6317d0138974ff02 Mon Sep 17 00:00:00 2001
From: Oskar <open7software@gmail.com>
Date: Sat, 5 Oct 2024 16:01:36 +0200
Subject: more

---
 8p4.cpp | 36 ++++++++++++++++++++++++++++++++++++
 8p5.cpp | 36 ++++++++++++++++++++++++++++++++++++
 8p6.cpp | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 118 insertions(+)
 create mode 100644 8p4.cpp
 create mode 100644 8p5.cpp
 create mode 100644 8p6.cpp

diff --git a/8p4.cpp b/8p4.cpp
new file mode 100644
index 0000000..68a4355
--- /dev/null
+++ b/8p4.cpp
@@ -0,0 +1,36 @@
+#include <iostream>
+#include <fstream>
+#include <vector>
+#include <string>
+
+/*
+ *
+ * 8.4
+ *
+ *
+ */
+
+int main (int argc, char **argv) {
+
+	if(argc < 2 || argc > 2) {
+		return 1;
+	}
+	
+	std::ifstream file(argv[1]);
+	if(file.fail()) {
+		return 1;
+	}
+	
+	std::vector<std::string> fvec;
+	std::string tmp;
+	while(std::getline(file, tmp)) {
+		fvec.push_back(tmp);
+	}
+
+	for(auto a : fvec) {
+		std::cout << a << "\n";
+	}
+
+	std::cout << std::ends;
+	return 0;
+}
diff --git a/8p5.cpp b/8p5.cpp
new file mode 100644
index 0000000..17c6223
--- /dev/null
+++ b/8p5.cpp
@@ -0,0 +1,36 @@
+#include <iostream>
+#include <fstream>
+#include <string>
+#include <vector>
+
+/*
+ *
+ * 8.5
+ *
+ *
+ */
+
+int main (int argc, char **argv) {
+
+	if(argc < 2 || argc > 2) {
+		return 1;
+	}
+
+	std::ifstream file(argv[1]);
+	if(file.fail()) {
+		return 1;
+	}
+
+	std::vector<std::string> svec;
+	std::string tmp;
+	while(file >> tmp) {
+		svec.push_back(tmp);
+	}
+
+	for(auto a : svec) {
+		std::cout << a << "\n";
+	}
+
+	std::cout << std::ends;
+	return 0;
+}
diff --git a/8p6.cpp b/8p6.cpp
new file mode 100644
index 0000000..a069b2d
--- /dev/null
+++ b/8p6.cpp
@@ -0,0 +1,46 @@
+#include <iostream>
+#include <fstream>
+#include "sales_data.hpp"
+
+/*
+ *
+ * 8.6
+ *
+ *
+ */
+
+int main (int argc, char **argv) {
+
+	if(argc < 2 || argc > 2) {
+		return -1;
+	}
+	
+	std::fstream file(argv[1]);
+	if(file.fail()) {
+		return -1;
+	}
+	
+	SalesData total;
+	// variable to hold the running sum
+	if (read(file, total)) { // read the first transaction
+		SalesData trans;
+		// variable to hold data for the next transaction
+		while(read(file, trans)) {
+			// read the remaining transactions
+			if (total.isbn() == trans.isbn())
+				// check the isbns
+				total.combine(trans); // update the running total
+			else {
+				print(std::cout, total) << std::endl; // print the results
+				total = trans;
+				// process the next book
+			}
+		}
+		print(std::cout, total) << std::endl;
+		// print the last transaction
+	} else {
+		// there was no input
+		std::cerr << "No data?!" << std::endl;
+		// notify the user
+	}
+}
-- 
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