60 lines
1.8 KiB
C++
Executable File
60 lines
1.8 KiB
C++
Executable File
/***************************************************************
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* Name: Aidan Sharpe
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* Course: Computer Science & Programming
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* Class: CS04103 Section: 6
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* Assignment Date: 10.18.2021
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* File Name: Homework05-1ASharpe.cpp
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*****************************************************************
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* ID: Homework 5 Problem 1
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* Purpose: Simulate a population for N years
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*****************************************************************/
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#include <iostream>
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#include <cmath>
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using namespace std;
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int getPopAfterNYears(int, float, float, int);
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int main()
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{
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int pop, time;
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float birthRate, deathRate;
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// get population data
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do
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{
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cout << "Original population size: ";
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cin >> pop;
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} while ( pop < 2 ); // ensure that population is at least 2
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do
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{
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cout << "Birth rate: ";
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cin >> birthRate;
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} while ( static_cast<int>(birthRate) != 0 ); // make sure birthRate is between 0 and 1
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do
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{
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cout << "Death rate: ";
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cin >> deathRate;
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} while ( static_cast<int>(deathRate) != 0 ); // make sure deathRate is between 0 and 1
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do
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{
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cout << "Time: ";
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cin >> time;
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} while ( time < 1 ); // ensure that time is at least 1 year
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// calculate & print the new population size after "time" years
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// note that pop is an int, so it will only increase
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cout << "Population after " << time << " years: " << getPopAfterNYears(pop, birthRate, deathRate, time);
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return 0;
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}
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int getPopAfterNYears(int pop, float birthRate, float deathRate, int time)
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{
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// find new population size for each year in the time range
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for (; time > 0; time--)
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pop = pop * (1 + birthRate) * (1 - deathRate);
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return pop;
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}
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