In Class Exercise - Population Study

You are a graduate student at Florida Atlantic University in the Business College's Information Technology Department. You have been asked by your advisor to write a C++ program for a faculty member in the Biology Department who is doing a study on population growth. You go to the Biology Department and they provide you with information about the program desired.

Specification:

The Biology faculty member who requested this program has provided you with the following specifications:

• The program will be dependent on

  • the starting population: P

  • the birth rate B and

  • the death rate D:

• The estimated population of a country after a year is the formula:

  • P + (P *B)/100 - (P*D)/100

• The population growth rate is the formula: B - D

• The program must have a modular design based upon the two functions:

  • growthRate( ) with arguments of birth rate and death rate

  • estimatedPopulaton( ) with arguments of population and growth rate.

• The input is to be:

  • starting population

  • birth rate

  • death rate

  • number of years for the study

• The output is to be:

  • a restatement of the input

  • a statement of the expected population after the number of years of the study

• The program must be robust with the requirement that

  • both the birth rate and the death rate must be non-negative

  • the value of population must be greater than 2.

 Note:  Create a sample input and output screen to match the statements above.

Sample Data: Using the formulas above, enter in the Projected Population sample data into the table below:

Open table as spreadsheet

Starting Population	Birth Rate	Death Rate	Years of Study	Projected Population
1000	5	3	5	???
100,000	10	15	10	???
500,000	100	60	20	???

 Note:  Using the sample data and the formulas above, enter the Projected Population for these values.

Design Phase:

 Note:  Try to create a structure chart and the pseudo code for this program. After you have done this, link to the following pages to see samples of these two design documents:

• sc_population

• pc_population

Coding Phase:

 Note:  Now that you have samples of the Specification Document, the Structure Chart and the Pseudo Code, try to write the C++ program using these tools. Try to follow the approach to programming discussed in the previous section.