Output
Variable Name     Value in Memory
radius
random value
area
random value
  1  #include <iostream>
  2  using namespace std;
  3  
  4  int main()
  5  {
  6    double radius;
  7    double area;
  8  
  9    // Step 1: Read in radius
 10    radius = 20;
 11  
 12    // Step 2: Compute area
 13    area = radius * radius * 3.14159;
 14  
 15    // Step 3: Display the area
 16    cout << "The area is " << area << endl;
 17  
 18    return 0;
 19  }