feat(Week02): Add solutions

3 files changed, 59 insertions, 0 deletions

diff --git a/Week02/Exercise03/intarray.cpp b/Week02/Exercise03/intarray.cpp
new file mode 100644
index 0000000..3d8853d
--- /dev/null
+++ b/Week02/Exercise03/intarray.cpp
@@ -0,0 +1,27 @@
+#include "intarray.h"
+
+void IntArray::deleteSelf() {
+	delete[] elems;
+
+	size = 0;
+	elems = nullptr;
+}
+
+int IntArray::sum() {
+	int totalSum = 0;
+	for (unsigned i = 0; i < size; ++i)
+		totalSum += elems[i];
+	return totalSum;
+}
+
+IntArray newIntArray(unsigned size) {
+	IntArray ia;
+	ia.size = size;
+	ia.elems = new int[size];
+
+	return ia;
+}
+
+void deleteIntArray(IntArray& arr) {
+	arr.deleteSelf();
+}
diff --git a/Week02/Exercise03/intarray.h b/Week02/Exercise03/intarray.h
new file mode 100644
index 0000000..9f1c0b0
--- /dev/null
+++ b/Week02/Exercise03/intarray.h
@@ -0,0 +1,15 @@
+#ifndef _INTARRAY
+#define _INTARRAY
+
+struct IntArray {
+	unsigned size;
+	int* elems;
+
+	void deleteSelf();
+	int sum();
+};
+
+IntArray newIntArray(unsigned size);
+void deleteIntArray(IntArray& arr);
+
+#endif
diff --git a/Week02/Exercise03/main.cpp b/Week02/Exercise03/main.cpp
new file mode 100644
index 0000000..07f59fb
--- /dev/null
+++ b/Week02/Exercise03/main.cpp
@@ -0,0 +1,17 @@
+#include <iostream>
+#include "intarray.h"
+
+int main() {
+	unsigned N;
+	std::cin >> N;
+
+	IntArray ia = newIntArray(N);
+	for (unsigned i = 0; i < ia.size; ++i)
+		std::cin >> ia.elems[i];
+
+	std::cout << ((double)ia.sum() / ia.size) << std::endl;
+
+	deleteIntArray(ia);
+
+	return 0;
+}