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1 files changed, 26 insertions, 0 deletions

diff --git a/1p25.cpp b/1p25.cpp
new file mode 100644
index 0000000..880a94b
--- /dev/null
+++ b/1p25.cpp
@@ -0,0 +1,26 @@
+#include <iostream>
+#include "sales_item.hpp"
+int main() {
+	Sales_item total; // variable to hold data for the next transaction
+	// read the first transaction and ensure that there are data to process
+	if (std::cin >> total) {
+		Sales_item trans; // variable to hold the running sum
+		// read and process the remaining transactions
+		while (std::cin >> trans) {
+			// if we’re still processing the same book
+			if (total.isbn() == trans.isbn())
+				total += trans; // update the running total
+			else {
+				// print results for the previous book
+				std::cout << total << std::endl;
+				total = trans; // total now refers to the next book
+			}
+		}
+		std::cout << total << std::endl; // print the last transaction
+	} else {
+		// no input! warn the user
+		std::cerr << "No data?!" << std::endl;
+		return -1; // indicate failure
+	}
+	return 0;
+}