Solved exercise 0 of homework1.cpp

1 files changed, 60 insertions, 2 deletions

diff --git a/Year 1/Programming introduction/Homeworks/homework1.cpp b/Year 1/Programming introduction/Homeworks/homework1.cpp
index f76c172..f443cb9 100644
--- a/Year 1/Programming introduction/Homeworks/homework1.cpp
+++ b/Year 1/Programming introduction/Homeworks/homework1.cpp
@@ -5,6 +5,65 @@
 using namespace std;
 
 /*
+ * Exercise 0
+ */
+
+double distanceBetweenPoints(int x1, int y1, int x2, int y2)
+{
+	int sideA = x1 - x2, sideB = y1 - y2;
+	return sqrt(sideA * sideA + sideB * sideB); // Pythagorean theorem
+}
+
+void ex0() {
+	// These should be precalculated, but this shows how they're found out
+	float const SLOPE_B =  2.828 /  2.828,
+				SLOPE_C = -2.828 / -2.828,
+				SLOPE_D = -2.828 /  2.828,
+				SLOPE_E =  2.828 / -2.828;
+
+	double x, y;
+	cin >> x >> y;
+
+	if (x == 0) // if it's on the Y ordinate
+		cout << "On a line" << endl;
+	else if (distanceBetweenPoints(0, 0, x, y) < 4.0) {
+		float pointSlope = y / x;
+
+		if (x == -2.828 || x == 2.828 || pointSlope == SLOPE_B || pointSlope == SLOPE_C || pointSlope == SLOPE_D || pointSlope == SLOPE_E)
+			cout << "On a line" << endl;
+		else if (y >= 0 && x > 0) { // Check 1st quadrant
+			if (pointSlope > SLOPE_B)
+				cout << "Inside green area!" << endl;
+			else if (x > 2.828)
+				cout << "Inside purple area!" << endl;
+			else
+				cout << "Inside yellow area!" << endl;
+		}
+		else if (y >= 0 && x < 0) { // Check 2nd quadrant
+			if (pointSlope < SLOPE_D)
+				cout << "Inside red area!" << endl;
+			else if (x > -2.828)
+				cout << "Inside pink area!" << endl;
+		}
+		else if (y < 0 && x < 0) { // Check 3rd quadrant
+			if (pointSlope > SLOPE_C)
+				cout << "Inside blue area!" << endl;
+			else if (x > -2.828)
+				cout << "Inside pink area!" << endl;
+		}
+		else { // Check 4th quadrant
+			if (pointSlope > SLOPE_E && x > 2.828)
+				cout << "Inside purple area!" << endl;
+			else
+				cout << "Inside yellow area!" << endl;
+		}
+	}
+	else if ((-2.0 < x && x < 2.0) && (-6.0 < y && y < -7.0)) // outside circle and in rectangle
+		cout << "Inside grey area" << endl;
+
+}
+
+/*
  * Exercise 1
  */
 
@@ -177,7 +236,6 @@ void countBullsAndCows(int secretNum, int guess, int *bulls, int *cows) {
 
 void playBullsAndCows() {
 	int secNum = genSecretNum(), guess = 0, bulls = 0, cows = 0;
-	cout << secNum << endl;
 
 	for (int i = 0; i < N; i++)  {
 		cin >> guess;
@@ -199,5 +257,5 @@ void ex5() {
 }
 
 int main() {
-	ex5();
+	ex0();
 }