Merge pull request #10 from NMannall/refresh-material-oct-24

Split containers exercise into part1 and part2 directories

exercises/containers/part1/Makefile

@@ -0,0 +1,10 @@
+CXXFLAGS = --std=c++17 -I../../include
+
+test : vector_ex.o test.o
+	$(CXX) $^ -o $@
+
+run : test
+	./test
+
+clean :
+	rm -rf *.o test

exercises/containers/part1/test.cpp

@@ -0,0 +1,56 @@
+// Catch2 is a unit testing library
+// Here we let it create a main() function for us
+#define CATCH_CONFIG_MAIN
+#include "catch.hpp"
+
+#include "vector_ex.hpp"
+#include <sstream>
+
+// type alias
+using IV = std::vector<int>;
+
+IV IntRange(int n) {
+  auto ans = IV(n);
+  for (int i = 0; i < n; ++i)
+    ans[i] = i;
+  return ans;
+}
+
+TEST_CASE("Vector Even") {
+  IV const empty;
+  REQUIRE(empty == GetEven(empty));
+
+  auto const zero = IntRange(1);
+  // Test the testing code!
+  REQUIRE(zero.size() == 1);
+  REQUIRE(zero[0] == 0);
+
+  REQUIRE(zero == GetEven(zero));
+
+  auto const zero_one = IntRange(2);
+  // Test the testing code!
+  REQUIRE(zero_one.size() == 2);
+  REQUIRE(zero_one[0] == 0);
+  REQUIRE(zero_one[1] == 1);
+
+  REQUIRE(zero == GetEven(zero_one));
+
+  // edited toddler random numbers
+  auto const random = IV{8, 127356, 1, 29, 4376, 263478, 1537};
+  auto const random_even = IV{ 8, 127356, 4376, 263478};
+  REQUIRE(GetEven(random) == random_even);
+}
+
+std::string STR(IV const& v) {
+  std::stringstream ss;
+  PrintVectorOfInt(ss, v);
+  return ss.str();
+}
+
+TEST_CASE("Vector Print") {
+  REQUIRE(STR(IV{}) == "[ ]");
+  REQUIRE(STR(IntRange(1)) == "[ 0]");
+  REQUIRE(STR(IntRange(2)) == "[ 0, 1]");
+  // edited toddler random numbers
+  REQUIRE(STR(IV{8, 127356, 1, 29, 4376, 263478, 1537}) == "[ 8, 127356, 1, 29, 4376, 263478, 1537]");
+}

exercises/containers/Makefile → exercises/containers/part2/Makefile

@@ -1,4 +1,4 @@
-CXXFLAGS = --std=c++17 -I../include
+CXXFLAGS = --std=c++17 -I../../include
 
 test : vector_ex.o map_ex.o test.o
 	$(CXX) $^ -o $@

exercises/containers/part2/vector_ex.cpp

@@ -0,0 +1,8 @@
+#include "vector_ex.hpp"
+
+// std::vector documentation:
+// https://en.cppreference.com/w/cpp/container/vector
+
+std::vector<int> GetEven(std::vector<int> const& source) {
+}
+

exercises/containers/part2/vector_ex.hpp

@@ -0,0 +1,18 @@
+#ifndef CPPEX_VECTOR_EX_HPP
+#define CPPEX_VECTOR_EX_HPP
+
+#include <vector>
+#include <iostream>
+
+// Here we declare two functions.
+// Provide implementations, in vector_ex.cpp
+
+// Given a vector of integers, return a new vector with only the even
+// elements from our input
+std::vector<int> GetEven(std::vector<int> const& source);
+
+// Given a vector of ints, print the data to the stream
+// [0, 1]
+void PrintVectorOfInt(std::ostream& output, std::vector<int> const& data);
+
+#endif