Hoja 03- Ejercicio 1

#include "stdafx.h"
#include <iostream>
#include <conio.h>
using namespace System;
using namespace std;
void Menu(){
	cout << "	Menu de opcion"<<endl;
	cout << "1. Calcular el seno"<<endl;
	cout << "2. Hallar el enesimo digito" << endl;
	cout << "3. Fin" << endl;
	cout << "Ingrese opcion: ";
}
void Ingresar_N(int *N){
	do
	{
		cout << "Ingrese el valor de N:";
		cin >> *N;
	} while (*N<0);
}
void Ingresar_x(int *x){
	do
	{
		cout << "Ingrese el valor de X:";
		cin >> *x;
	} while (*x<0);
}
void Factorial(int *fact, int i){
	*fact = 1;
	for (int j = 0; j < (i * 2) + 1; j++)
	{
		if (j == 0)
		{
			*fact = 1;
		}
		else
			*fact = *fact + j;
	}
}
void SenX(int *N){
	int *x = new int;
	Ingresar_x(x);
	int *fact = new int;
	double *suma = new double;
	*suma = 0;
	for (int i = 0; i < *N; i++)
	{
		Factorial(fact, i);
		*suma = *suma + pow(-1, i)*(pow(*x, 2 * i + 1) / *fact);
	}
	cout << "El seno de " << *x << " es: " << *suma<<endl;

}
void Ingresar_num(int *num){
	do
	{
		cout << "Ingrese el numero: ";
		cin >> *num;
	} while (*num<0);
}
void Digit(int *N,int *num){

	int n1, n2;
	int numero;
	n1 = pow(10, *N + 1);
	n2 = pow(10, *N);
	numero = ((*num % n1) - (*num % n2)) / n2;
	if (numero < 0)
		numero = numero * (-1);

	if (numero != 0){
		cout << "El n-esimo digito es: " << numero << endl;
	}else
		cout << "El n-esimo digito es : -1" << endl;
}
int main(array<System::String ^> ^args)
{
	int opc_menu;
	int *N = new int;
	int *num = new int;
	while (1)
	{
		cout << "----------------------------------------------------" << endl;
		Menu();
		cin >> opc_menu;
		switch (opc_menu)
		{
		case 1:
			Ingresar_N(N);
			SenX(N);
			break;
		case 2:
			Ingresar_N(N);
			Ingresar_num(num);
			Digit(N,num);
			break;
		case 3:
			exit(0);
			break;
		default:
			break;
		}
	}
	_getch();
}