c++ code for day14 (#144)

* factorial in c++

* fibonacci recursion

* c++ code for day14

day14/C++/product_of_two_numbers.cpp

@@ -0,0 +1,47 @@
+/**
+ * @author: Karthick < karthikn2099@gmail.com >
+ * @github: https://github.com/karthikn2098
+ * @date: 08/01/2018
+ */
+
+#include <bits/stdc++.h>
+using namespace std;
+
+int product(int number , int times) {
+
+    //if multiplier is a negative number.
+    if(times < 0) {
+        return number + product(number , times+1);
+    }
+
+    if(times == 0) {
+        return 0;
+    }
+
+    return number + product(number , times-1);
+}
+
+int main(void) {
+
+    int A , B;
+
+    cout << "Enter A & B: " ;
+    cin >> A >> B;
+
+    cout << "Product of " << A << " & " << B << " = " << product(A , B);
+
+    return 0;
+}
+
+/*
+---------------------
+ Sample Input/Output
+---------------------
+
+        1)  Enter A & B: 10 5
+            Product of 10 & 5 = 50
+
+        2)  Enter A & B: -2 -3
+            Product of -2 & -3 = -6
+
+*/

day14/C++/sum_of_digits.cpp

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+/**
+ * @author: Karthick < karthikn2099@gmail.com >
+ * @github: https://github.com/karthikn2098
+ * @date: 08/01/2018
+ */
+
+#include <bits/stdc++.h>
+using namespace std;
+
+int sumOfDigits(int N) {
+
+    if( N == 0 ) {
+        return 0;
+    }
+    return ( sumOfDigits(N/10) + N%10 );
+
+}
+
+int main(void) {
+
+    int N;
+
+    cout << "Enter the Number: ";
+    cin >> N;
+
+    cout << "\nThe sum of digits = " << sumOfDigits(N);
+
+    return 0;
+}
+
+/*
+---------------------
+ Sample Input/Output
+---------------------
+
+    Enter the Number: 1234
+
+    The sum of digits = 10
+
+*/