Answered: How do I write my computer program that…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

How do I write my computer program that shows the current population at 78,000. And there are 365 days in a year. A baby born every 7 seconds, someone dies every 13 seconds and an one new immigrant every 45 seconds.

Print the next 5 years population

Expert Solution

Step 1

Programming approach

Set birth rate "birthRate" to 7 seconds.
Set death rate "dyingRate" to 13 seconds.
Set immigrant rate "newImmigrant" to 45 seconds.
Set current population "currentPopulation" to 78000.
Calculate the number of seconds in one year
- seconds = 60 * 60 * 24 * 365;
Calculate a number of births in one year
- birthNumber = seconds / birthRate
Calculate number of deaths in one year
- deathNumber = seconds / dyingRate
Calculate number of Immigrants in one year
- immigrantNumber = seconds / newImmigrant
Fop loop from index = 1 to 5 for five years
- Calculate total population
  - currentPopulation += birthNumber + immigrantNumber - deathNumber
  - Print currentPopulation.

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