ECE 114 09

ece09.cpp

#include "include.h"

int main(){
	while (true)
	{
		std::cout << "1. Plane Passengers\n2. SNR calculator\n3. Taylor Series\n4. Exit\n\nEnter Choice: ";
		int choice;
		std::cin >> choice;
		if (choice == 1)
		{
			int flight1_3 = 0;
			int flight1_4 = 0;
			int flight1_5 = 0;
			int flight2_3 = 0;
			int flight2_4 = 0;
			int flight2_5 = 0;

			while (true){
				int numToAdd;
				std::cout << "Number of passengers to add [0 to end.]: ";
				std::cin >> numToAdd;
				if (numToAdd > 0)
				{
					while (numToAdd > 0)
					{
						
						std::cout << "Flight Class: ";
						int fn;
						std::cin >> fn;
						if (fn == 1)
						{
							std::cout << "No 1st class seating available.\n";
							continue;
						}
						else if (fn == 2)
						{
							std::cout << "No 2nd class seating available.\n";
							continue;
						} else if (fn >= 3 && fn <= 5)
						{
							int flightNum;
							std::cout << "Enter Flight Number: ";
							std::cin >> flightNum;
							if (flightNum == 1)
							{
								switch (fn)
								{
									case 3:
										flight1_3++;
										break;
									case 4:
										flight1_4++;
										break;
									case 5:
										flight1_5++;
										break;
								}
							} else if (flightNum == 2)
							{
								switch (fn)
								{
								case 3:
									flight2_3++;
									break;
								case 4:
									flight2_4++;
									break;
								case 5:
									flight2_5++;
									break;
								}
							}
						} else
						{
							std::cout << "No " << fn <<"th class seating available.\n";
							continue;
						}
							
						numToAdd--;
					}
				} else
				{
					break;
				}
			}
			printf("Flight 1: %i Class 3, %i Class 4, %i Class 5\nFlight 2: %i Class 3, %i Class 4, %i Class 5\n\n", flight1_3, flight1_4, flight1_5, flight2_3, flight2_4, flight2_5);
		} else if (choice == 2)
		{
			std::cout << "Enter Epsilon Value: " ;
			double evalue;
			std::cin >> evalue;
			printf("SNR_v = %3.10f\n\n", calcSNR_v(evalue));
		} else if (choice == 3)
		{
			std::cout << "Enter X value: ";
			int x;
			std::cin >> x;
			double remVal = 1e-12;
			double total = 0.0;
			int count = 0;
			while (true)
			{
				double elem = pow(x, (double)count) / factorial(count);
				total += elem;
				if (elem < remVal)
				{
					break;
				}
				count++;

			}
			printf("e^%i = %4.10f\n\n", x, total);
		} else if (choice == 4)
		{
			break;
		}
		else
		{
			std::cout << "Not an option\n\n";
		}
	}
	return 0;
}

include.cpp

#include "include.h"

double calcSNR_v(double epsilon)
{
	double res;
	if (epsilon <= 1.6755)
	{
		res = sqrt(M_PI / (4 - M_PI))*((pow(epsilon, 2.0) / 4.0) - (pow(epsilon, 4.0) / 64.0) + (pow(epsilon, 6.0) / 768.0));
	} else
	{
		res = sqrt(2.0 / (4 - M_PI))*(
			epsilon - sqrt(M_PI / 2)
			+ (1 / (2 * epsilon))
			+ (1 / (8 * pow(epsilon, 3.0)))
			+ (3 / (16 * pow(epsilon, 5.0)))
			);
	}
	return res;
}

int factorial(int n)
{
	return (n == 1 || n == 0) ? 1 : factorial(n - 1) * n;
}

include.h

#include <iostream>
# define M_PI           3.14159265358979323846  /* pi */

double calcSNR_v(double epsilon);
int factorial(int n);