Add Element struct for matrix representation

Author: Karanjot786

CPP/data_structures/example.cpp

@@ -3,6 +3,7 @@
 using namespace std;
 
 // Simplified version for demonstration
+
 struct Element {
     int row, col, value;
     Element(int r, int c, int v) : row(r), col(c), value(v) {}
@@ -85,4 +86,4 @@ int main() {
     cout << "please run the main program: sparse_matrix_operations.cpp\n";
 
     return 0;
-}
+}