first semester files

1st-Semester-Fall-2021/CSNP/CSNP-04103-Homework-#5/Homework05-1ASharpe.cpp

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