1. solve the following problem...
Problem Session
Working in pairs of two,
solve the following problem...

2. Problem
Using OCD, design and implement a program that, given the height, width, and depth of a rectangular solid, computes and displays its volume and surface area.
depth
height
width

3. OCD: Behavior
Our program should display on the screen its purpose, plus a prompt for the height, width, and depth of a rectangular solid, which it should then read from the keyboard. It should then compute and display the volume and surface area of that rectangular solid, along with a descriptive label.

4. OCD: Objects Description Type Kind Name screen ostream varying cout
purpose string constant
prompt string constant
height double variable height
width double variable width
depth double variable depth
keyboard istream varying cin
volume double variable volume
surface area double variable surfaceArea

5. OCD: Operations Description Predefined? Library? Name
display strings yes iostream <<
read doubles yes iostream >>
compute volume no
- multiply doubles yes built-in *
compute s.area no
- multiply doubles yes built-in *
- add doubles yes built-in +
display doubles yes iostream <<

6. OCD: Algorithm
0. Display via cout the purpose of the program plus a prompt for the height, width and depth of a rectangular solid.
1. Read height, width and depth from cin.
2. Compute volume = height * width * depth.
3. Compute surfaceArea = 2.0 * (height * width + height * depth + width * depth).
4. Display volume and surfaceArea with descriptive labels.

7. Coding #include <iostream> using namespace std; int main() {
cout << “\nTo compute the volume and surface area”
<< “\n of a rectangular solid, enter its”
<< “\n height, width, and depth: “;
double height, width, depth;
cin >> height >> width >> depth;
double volume = height * width * depth;
double surfaceArea = 2.0 * (height * width +
width * depth + height * depth);
cout << “\nThe volume is “ << volume
<< “ and the surface area is “ << surfaceArea
<< endl; }

8. Summary Take the time to design your programs.
Object-centered design (OCD) makes problem-solving relatively easy!