C++ code for day1 (#177)

* factorial in c++

* fibonacci recursion

* c++ code for day14

* C++ solution for day15 added

* day1 FizzBuzz Code in C++

* C++ code for day2

Author: Karthikn2099

Day1/C++/FizzBuzz_Program.cpp

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+/**
+ * @author: Karthick < karthikn2099@gmail.com >
+ * @github: https://github.com/karthikn2098
+ * @date: 15/01/2018
+ */
+
+#include <iostream>
+using namespace std;
+
+void fizzBuzz1(int N) {
+
+    for( int i = 1 ; i <= N ; i++ ) {
+
+        if( (i % 3 == 0) && (i % 5 == 0) ) {
+            cout << "FizzBuzz ";
+        }
+        else if( i % 3 == 0 ) {
+            cout << "Fizz ";
+        }
+        else if( i % 5 == 0 ) {
+            cout << "Buzz ";
+        }
+        else {
+            cout << i << " ";
+        }
+
+    }
+}
+
+void fizzBuzz2(int N) {
+
+    for( int i = 1 ; i <= N ; i++ ) {
+
+        string str = "";
+
+        if(i % 3 == 0) str += "Fizz";
+
+        if(i % 5 == 0) str += "Buzz";
+
+        if(str == "") {
+            cout << i << " ";
+        }
+        else {
+            cout << str << " ";
+        }
+
+    }
+
+}
+
+int main(void) {
+
+    int N;
+
+    cout << "Enter N: ";
+    cin >> N;
+
+    fizzBuzz1(N);
+    cout << endl << endl;
+
+    fizzBuzz2(N);
+    cout << endl << endl;
+
+    return 0;
+}
+
+/**
+---------------------
+ Sample Input/Output
+---------------------
+
+Enter N: 25
+    1 2 Fizz 4 Buzz Fizz 7 8 Fizz Buzz 11 Fizz 13 14 FizzBuzz 16 17 Fizz 19 Buzz Fizz 22 23 Fizz Buzz
+
+    1 2 Fizz 4 Buzz Fizz 7 8 Fizz Buzz 11 Fizz 13 14 FizzBuzz 16 17 Fizz 19 Buzz Fizz 22 23 Fizz Buzz
+
+*/

Day2/C++/string_reverse_palindrome.cpp

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+/**
+ * @author: Karthick < karthikn2099@gmail.com >
+ * @github: https://github.com/karthikn2098
+ * @date: 15/01/2018
+ */
+
+#include <iostream>
+#include <string>
+using namespace std;
+
+//function to reverse the string.
+string reverse_string( string str ) {
+
+    int i = 0 , j = str.length() - 1;
+
+    while(i <= j) {
+        swap(str[i++] , str[j--]);
+    }
+
+    return str;
+}
+
+//function that checks the string is palindrome or not.
+bool checkPalindrome( string str ) {
+
+    int i = 0 , j = str.length() - 1;
+
+    while( i <= j ) {
+        if( str[i++] != str[j--] ) {
+            return false;
+        }
+    }
+
+    return true;
+}
+
+
+int main(void) {
+
+    cout << "Reverse of abcd: " << reverse_string("abcd");
+
+    cout << "\n\nReverse of abcde: " << reverse_string("abcde");
+
+    cout << endl;
+
+    if( checkPalindrome("amma") ) {
+        cout << "\nPalindrome\n";
+    }
+    else {
+        cout << "\nNot a palindrome\n";
+    }
+
+
+    return 0;
+}
+
+/**
+Output:
+
+Reverse of abcd: dcba
+
+Reverse of abcde: edcba
+
+Palindrome
+
+*/