Merge pull request #255 from Razdeep/rrc

Added cpp implementation of rotateTile(Day25)

Author: Razdeep

day25/C++/rotateTile.cpp

@@ -0,0 +1,63 @@
+/**
+ * @author : Rajdeep Roy Chowdhury<rrajdeeproychowdhury@gmail.com>
+ * @handle : razdeep
+ * @date   : Feb 17, 2019
+ */
+#include <bits/stdc++.h>
+std::vector<std::vector<int>> rotate(std::vector<std::vector<int>> &two_D_array)
+{
+    std::vector<std::vector<int>> result(two_D_array.size());
+    for(int i=0; i<two_D_array.size();i++)
+    {
+        std::vector<int> this_array(two_D_array.size(), 0);
+        result[i] = this_array;
+    }
+    int rj = two_D_array.size() - 1, ri = 0;
+    for (int i = 0; i < two_D_array.size(); i++)
+    {
+        for (int j = 0; j < two_D_array[i].size(); j++)
+        {
+            result[ri++][rj] = two_D_array[i][j];
+        }
+        rj--;
+        ri = 0;
+    }
+    return result;
+}
+int main(int argc, char **argv)
+{
+    int n;
+    std::cout << "Enter the value of n ";
+    std::cin >> n;
+    std::vector<std::vector<int>> two_D_array(n);
+    for (int i = 0; i < n; i++)
+    {
+        std::vector<int> this_array(n, 0);
+        // std::vector<int> this_array = new std::vector<int>(n);
+        for (int j = 0; j < n; j++)
+        {
+            std::cin >> this_array[j];
+        }
+        two_D_array[i] = this_array;
+    }
+    std::cout << "Original Matrix is..." << std::endl;
+    for (int i = 0; i < two_D_array.size(); i++)
+    {
+        for (int j = 0; j < two_D_array[i].size(); j++)
+        {
+            std::cout << two_D_array[i][j] << " ";
+        }
+        std::cout << std::endl;
+    }
+    std::vector<std::vector<int>> rotated_2d_array = rotate(two_D_array);
+    std::cout << "Rotated matrix is" << std::endl;
+    for (int i = 0; i < two_D_array.size(); i++)
+    {
+        for (int j = 0; j < two_D_array[i].size(); j++)
+        {
+            std::cout << rotated_2d_array[i][j] << " ";
+        }
+        std::cout << std::endl;
+    }
+    return 0;
+}

day25/README.md

@@ -158,4 +158,72 @@ public class rotateTile {
         }
     }
 }
+```
+## C++ Implementation
+
+### [Solution](./C++/rotateTile.cpp)
+```cpp
+/**
+ * @author : Rajdeep Roy Chowdhury<rrajdeeproychowdhury@gmail.com>
+ * @handle : razdeep
+ * @date   : Feb 17, 2019
+ */
+#include <bits/stdc++.h>
+std::vector<std::vector<int>> rotate(std::vector<std::vector<int>> &two_D_array)
+{
+    std::vector<std::vector<int>> result(two_D_array.size());
+    for(int i=0; i<two_D_array.size();i++)
+    {
+        std::vector<int> this_array(two_D_array.size(), 0);
+        result[i] = this_array;
+    }
+    int rj = two_D_array.size() - 1, ri = 0;
+    for (int i = 0; i < two_D_array.size(); i++)
+    {
+        for (int j = 0; j < two_D_array[i].size(); j++)
+        {
+            result[ri++][rj] = two_D_array[i][j];
+        }
+        rj--;
+        ri = 0;
+    }
+    return result;
+}
+int main(int argc, char **argv)
+{
+    int n;
+    std::cout << "Enter the value of n ";
+    std::cin >> n;
+    std::vector<std::vector<int>> two_D_array(n);
+    for (int i = 0; i < n; i++)
+    {
+        std::vector<int> this_array(n, 0);
+        // std::vector<int> this_array = new std::vector<int>(n);
+        for (int j = 0; j < n; j++)
+        {
+            std::cin >> this_array[j];
+        }
+        two_D_array[i] = this_array;
+    }
+    std::cout << "Original Matrix is..." << std::endl;
+    for (int i = 0; i < two_D_array.size(); i++)
+    {
+        for (int j = 0; j < two_D_array[i].size(); j++)
+        {
+            std::cout << two_D_array[i][j] << " ";
+        }
+        std::cout << std::endl;
+    }
+    std::vector<std::vector<int>> rotated_2d_array = rotate(two_D_array);
+    std::cout << "Rotated matrix is" << std::endl;
+    for (int i = 0; i < two_D_array.size(); i++)
+    {
+        for (int j = 0; j < two_D_array[i].size(); j++)
+        {
+            std::cout << rotated_2d_array[i][j] << " ";
+        }
+        std::cout << std::endl;
+    }
+    return 0;
+}
 ```