feat(Week07): Add solutions

1 files changed, 29 insertions, 0 deletions

diff --git a/Week07/Exercise09.cpp b/Week07/Exercise09.cpp
new file mode 100644
index 0000000..d68b427
--- /dev/null
+++ b/Week07/Exercise09.cpp
@@ -0,0 +1,29 @@
+#include <iostream>
+
+double topower(double x, unsigned int a) {
+	double result = 1.0;
+	for (unsigned int i = 1; i <= a; i++)
+		result *= x;
+	return result;
+}
+
+int main() {
+	const unsigned int SIZE = 11;
+	double coeffs[SIZE], root;
+
+	for (unsigned int i = 0; i < SIZE; i++)
+		std::cin >> coeffs[i];
+	std::cin >> root;
+
+	double sum = 0.0;
+	for (unsigned int i = 0; i < SIZE; i++)
+		sum += coeffs[i] * topower(root, 10 - i);
+
+	const double ZERO_BORDER = 0.0001;
+	if (-ZERO_BORDER < sum && sum < ZERO_BORDER)
+		std::cout << "Is a root" << std::endl;
+	else
+		std::cout << "Not a root" << std::endl;
+
+	return 0;
+}