The following function ddefinitions can be used for lab0501 , the task is to add prototypes for them AND update washer.cpp to call these functions replacing the hard coded calculations.

float findArea(float r) 

{ 

 return PI * r * r; 

} 

float findRimArea(float outerRadius, float innerRadius) 

{ 

 return findArea(outerRadius) - findArea(innerRadius); 

} 

float findUnitWeight(float a, float t, float d) 

{ 

 return a * t * d; 

} 

void instruct() 

{ 

 cout << "--==[ Welcome to Washer 2.0 ]==--" << endl << endl; 

 cout << "Enter in the following 5 values in this order" << endl; 

 cout << " Inner diameter in centimeters" << endl; 

 cout << " Outer diameter in centimeters" << endl; 

 cout << " Thickness in centimeters" << endl; 

 cout << " Material density in grams per cubic centimeter" << endl; 

 cout << " Quantity in batch" << endl; 

}