Create WavePrintMatrixProgram.cpp

This is the program for the "Wave Print Matrix Program" addressed in the Issue Number 222. I believe this is exactly what was asked to do, so kindly merge it into the repo. This is the C++ Version of the same, i have also requested for the Java version too in my previous PR, so kindly see that too if it haven't been merged yet.

Link to the issue : panditakshay402#222

C++/WavePrintMatrixProgram.cpp

@@ -0,0 +1,59 @@
+//Wave Print Matrix Program - Mr. Eshank Tyagi
+#include <iostream>
+#include <vector>
+
+int main() 
+{
+    std::vector<std::vector<int>> arr;
+    int r, c;
+
+    std::cout << "\nEnter the number of rows : ";
+    std::cin >> r;
+
+    std::cout << "\nEnter the number of columns : ";
+    std::cin >> c;
+
+    arr.resize(r, std::vector<int>(c));
+
+    std::cout << "\nEnter the elements of the matrix :-\n";
+
+    for(int i = 0; i < r; i++) 
+    {
+        for(int j = 0; j < c; j++) 
+        {
+            std::cin >> arr[i][j];
+        }
+    }
+
+    std::cout << "The matrix is :-\n";
+
+    for(int i = 0; i < r; i++) 
+    {
+        for(int j = 0; j < c; j++) 
+        {
+            std::cout << arr[i][j] << " ";
+        }
+        std::cout << std::endl;
+    }
+
+    std::cout << "The wave print of the matrix is :-\n";
+
+    for(int i = 0; i < c; i++) 
+    {
+        if(i % 2 == 0) {
+            for(int j = 0; j < r; j++) 
+            {
+                std::cout << arr[j][i] << " ";
+            }
+        }
+        else 
+        {
+            for(int j = r - 1; j >= 0; j--) 
+            {
+                std::cout << arr[j][i] << " ";
+            }
+        }
+    }
+
+    return 0;
+}