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3 files changed, 127 insertions, 0 deletions

diff --git a/5p15.cpp b/5p15.cpp
new file mode 100644
index 0000000..4b9abd4
--- /dev/null
+++ b/5p15.cpp
@@ -0,0 +1,26 @@
+
+/*
+ *
+ * 5.15
+ *
+ *
+ */
+
+int main () {
+
+	/* Corrected versions
+	  
+	  (a)
+	  int ix = 0;
+	  for ( ; ix != sz ; ++ix) {}
+	  if (ix != sz)
+	  
+	  (b)
+	  int ix = 0;
+	  for ( ; ix != sz ; ++ix) {}
+	  
+	  (c)
+	  for (int ix = 0 ; ix != sz ; ++ix) {}
+	 */
+	return 0;
+}
diff --git a/5p16.cpp b/5p16.cpp
new file mode 100644
index 0000000..27c6bcb
--- /dev/null
+++ b/5p16.cpp
@@ -0,0 +1,57 @@
+#include <iostream>
+#include <vector>
+
+/*
+ *
+ * 5.16
+ *
+ *
+ */
+
+void idiomatic_while(std::vector<int> &idw) {
+
+	int i = 0;
+	while(std::cin >> i) {
+		idw.push_back(i);
+	}
+}
+
+void idiomatic_for(std::vector<int> &idf) {
+
+	for(auto a : idf) {
+		std::cout << a << std::endl;
+	}
+}
+
+void nonidiomatic_while(std::vector<int> &nidw) {
+
+	auto iter = nidw.cbegin();
+	while(iter != nidw.cend()) {
+		std::cout << *iter++ << std::endl;
+	}
+}
+
+void nonidiomatic_for(std::vector<int> &nidf) {
+
+	int i = 0;
+	for( ; std::cin >> i ; ) {
+		nidf.push_back(i);
+	}
+}
+
+int main (int argc, char *argv[]) {
+
+	if(argc > 2 || argc < 2) { return -1; }
+	std::string argv_s = argv[1];
+	std::vector<int> iv1;
+	std::vector<int> iv2;
+	if(argv_s == "1") {
+		idiomatic_while(iv1);
+		idiomatic_for(iv1);
+	} else if (argv_s == "2") {
+		nonidiomatic_for(iv2);
+		nonidiomatic_while(iv2);
+	}
+	
+	return 0;
+}
diff --git a/5p17.cpp b/5p17.cpp
new file mode 100644
index 0000000..154996f
--- /dev/null
+++ b/5p17.cpp
@@ -0,0 +1,44 @@
+#include <iostream>
+#include <vector>
+
+/*
+ *
+ * 5.17
+ *
+ *
+ */
+
+int main () {
+
+	std::vector<int> v1 = {1,1,1,1,2};
+	std::vector <int> v2 = {1,1,1,1,2};
+	auto v1l = v1.size();
+	auto v2l = v2.size();
+	decltype(v1.cend()) smallestend;
+	decltype(v1.cbegin()) smallestbeg;
+	decltype(v1.cbegin()) biggestbeg;
+	if(v1l > v2l) {
+		smallestend = v2.cend();
+		smallestbeg = v2.cbegin();
+		biggestbeg = v1.cbegin();
+	} else if (v2l > v1l) {
+		smallestend = v1.cend();
+		smallestbeg = v1.cbegin();
+		biggestbeg = v2.cbegin();
+	} else if (v1l == v2l) {
+		smallestend = v1.cend();
+		smallestbeg = v1.cbegin();
+		biggestbeg = v2.cbegin();
+	}
+
+	bool determine_prefix = true;
+	for( ; smallestbeg != smallestend ; ++smallestbeg, ++biggestbeg) {
+		if(*smallestbeg != *biggestbeg) {
+			determine_prefix = false;
+			break;
+		}
+	}
+
+	std::cout << (determine_prefix ? "true" : "false")  << std::endl;
+	return 0;
+}