add: this_pointer 04

Author: webwithaman

10_this_pointer/04_implement_method_chanining.cpp

@@ -0,0 +1,48 @@
+// // Create a class Rectangle and include a member function area and a function setDimensions to set width and height of the rectangle. Enable method chaining by returning the this pointer from the setDimensions function.
+
+// // Header files
+#include <iostream>
+
+// // use namespace
+using namespace std;
+
+// // define class Rectangle
+class Rectangle
+{
+
+private:
+    // // instance member variables
+    double length;
+    double breadth;
+
+public:
+    // // instance member function to set dimensions
+    Rectangle &setDimensions(double length, double breadth)
+    {
+        this->length = length;
+        this->breadth = breadth;
+        return *this;
+    }
+
+    // // instance member function to find area of rectangle
+    void area()
+    {
+        cout << "\nArea => " << length * breadth;
+    }
+};
+
+// // Main Function Start
+int main()
+{
+
+    // // create an instance of Rectangle
+    Rectangle r1;
+
+    // // set dimensions and calculate area
+    r1.setDimensions(5, 10).area();
+
+    cout << endl; // Add new line
+    cin.ignore();
+    return 0;
+}
+// // Main Function End