more exercises

1 files changed, 56 insertions, 0 deletions

diff --git a/3p21.cpp b/3p21.cpp
new file mode 100644
index 0000000..f1bad84
--- /dev/null
+++ b/3p21.cpp
@@ -0,0 +1,56 @@
+#include <iostream>
+#include <vector>
+#include "sales_data.hpp"
+#include "sales_item.hpp"
+
+/*
+ *
+ * 3.21
+ *
+ * 
+ */
+
+using std::string;
+using std::cout;
+using std::cin;
+using std::cerr;
+using std::clog;
+using std::endl;
+using std::vector;
+
+void cout_vector_int_iterator(vector<int> vx) {
+
+	for(auto itr = vx.cbegin() ; itr != vx.cend() ; itr++) {
+		cout << "'" << *itr << "'";
+	}
+	
+	cout << endl;
+}
+
+void cout_vector_string_iterator(vector<string> vxs) {
+
+	for(auto itr = vxs.cbegin() ; itr != vxs.cend() ; itr++) {
+		cout << "'" << *itr << "'";
+	}
+	
+	cout << endl;
+}
+
+int main () {
+
+    vector<int> v1; // 0 elements?
+	vector<int> v2(10); // 10 elements, default initialized
+	vector<int> v3(10, 42); // 10 elements, all initialized to 42
+	vector<int> v4{10}; // 1 element, initialized to 10.
+	vector<int> v5{10, 42}; // 2 elements, first one 10, second one 42
+	vector<string> v6{10}; // Not really valid but it creates 10 elements of default initialized strings. Empty strings.
+	vector<string> v7{10, "hi"}; // Not really valid but creates 10 elements that says "hi"
+	cout_vector_int_iterator(v1);
+	cout_vector_int_iterator(v2);
+	cout_vector_int_iterator(v3);
+	cout_vector_int_iterator(v4);
+	cout_vector_int_iterator(v5);
+	cout_vector_string_iterator(v6);
+	cout_vector_string_iterator(v7);
+	return 0;
+}