From 4ff0e42f65d8bba3d21bed53bfe1251d8db5c13f Mon Sep 17 00:00:00 2001
From: Carlos Maiolino <cem@toxiclabs.cc>
Date: Fri, 20 Feb 2026 16:17:14 +0100
Subject: extra code

---
 CPP/cpp_book/chap6/approval.cpp | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 CPP/cpp_book/chap6/approval.cpp

(limited to 'CPP/cpp_book/chap6/approval.cpp')

diff --git a/CPP/cpp_book/chap6/approval.cpp b/CPP/cpp_book/chap6/approval.cpp
new file mode 100644
index 0000000..c31c7b5
--- /dev/null
+++ b/CPP/cpp_book/chap6/approval.cpp
@@ -0,0 +1,28 @@
+#include <vector>
+#include <iostream>
+#include "student_info.h"
+#include "grade.h"
+#include "approval.h"
+
+bool fgrade(const StudentInfo& s) {
+	return grade(s) < 60;
+}
+
+std::list<StudentInfo>
+extract_fails(
+	std::list<StudentInfo>& students)
+{
+	std::list<StudentInfo> fail;
+	std::list<StudentInfo>::iterator iter = students.begin();
+
+	while (iter != students.end()) {
+		if (fgrade(*iter)) {
+			fail.push_back(*iter);
+			iter = students.erase(iter);
+		} else {
+			iter++;
+		}
+	}
+
+	return fail;
+}
-- 
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