Add feat program

RightTriangleChecker.cpp

@@ -0,0 +1,56 @@
+// C++ program to check validity of triplets 
+#include <bits/stdc++.h> 
+using namespace std; 
+
+// Function to check pythagorean triplets 
+bool Triplets(long long a, long long b, long long c) 
+{ 
+	if (a <= 0 || b <= 0 || c <= 0) 
+		return false; 
+
+	vector<long long> vec{ a, b, c }; 
+	sort(vec.begin(), vec.end()); 
+
+	// Re-initialize a, b, c in ascending order 
+	a = vec[0], b = vec[1], c = vec[2]; 
+
+	// Check validation of sides of triangle 
+	if (a + b <= c) 
+		return false; 
+
+	long long p1 = a, p2 = c - b; 
+
+	// Reduce fraction to simplified form 
+	long long div = __gcd(p1, p2); 
+	p1 /= div, p2 /= div; 
+
+	long long q1 = c + b, q2 = a; 
+
+	// Reduce fraction to simplified form 
+	div = __gcd(q1, q2); 
+	q1 /= div, q2 /= div; 
+
+	// If fraction are equal return 
+	// 'true' else 'false' 
+	return (p1 == q1 && p2 == q2); 
+} 
+
+// Function that will return 'Yes' or 'No' 
+// according to the correction of triplets 
+string checkTriplet(long long a, long long b, long long c) 
+{ 
+	if (Triplets(a, b, c)) 
+		return "Yes,its a right angled triangle"; 
+	else
+		return "No,its not a right triangle"; 
+} 
+
+// Driver code 
+int main() 
+{ 
+	long long a,b,c;
+    cout<<"Enter three sides:";
+    cin>>a>>b>>c;  
+	cout << checkTriplet(a, b, c) << endl; 
+	return 0; 
+} 

cellphonecompany.cpp

@@ -0,0 +1,70 @@
+#include <iostream>
+#include <iomanip>
+
+using namespace std;
+double cost;
+
+double regularBill()
+{
+    int minutes;
+
+    cout << "Enter the number of minutes used: ";
+    cin >> minutes;
+
+    if (minutes <= 50)
+      minutes = 0;
+    else
+      minutes -= 50;
+
+    cost = 10 + minutes * 0.20;
+    return cost;
+}
+
+double premiumBill()
+{
+    int minDay, minNight;
+    double costDay, costNight;
+
+    cout << "Enter the number of minutes used at day and at night (separated by spaces): ";
+    cin >> minDay >> minNight;
+
+    if (minDay <= 75)
+      minDay = 0;
+    else
+      minDay -= 75;
+    costDay = 0.10 * minDay;
+
+    if (minNight <= 100)
+      minNight = 0;
+    else
+      minNight -= 100;
+    costNight = 0.05 * minNight  ;
+
+    cost = 10 + costDay + costNight;
+
+    return cost;
+}
+int main()
+{
+  char service;
+  int accnum;
+  cout << "Enter account number: ";
+  cin >> accnum;
+  cout << "Enter 'r' for regular service or 'p' for premium service: ";
+  cin >> service;
+  cout << fixed << showpoint << setprecision(2);
+
+  if (service == 'r' || service == 'R')
+  {
+         cout << "Cost: $" << regularBill();
+  }
+  else if (service == 'p' || service == 'P')
+  {
+    cout << "Cost: $" << premiumBill();
+  }
+  else
+    cout << "Incorrect input. Try again later.";
+
+
+  return 0;
+}