WSQ12

CALCULATING e

¡Hello!

I found out how to show the exactly number of decimals that I wanted at:

https://stackoverflow.com/questions/554063/how-do-i-print-a-double-value-with-full-precision-using-cout

You can download my code at: https://drive.google.com/a/itesm.mx/file/d/1bFeOYSSUGlc4pWENeNONjvTAQRDKcZhb/view?usp=sharing

or you can see my code here:

	//MarielCisneros
	//TC1017
	#include <iostream>
	#include <math.h>
	using namespace std;
	double factorial (int number){
	if (number==0){
	return 1;
	} else {
	return number*factorial(number-1);
	}
	}
	double calculating_e(double precision){
	double e=0.0,oldE;
	int i=0;
	do{
	oldE=e; //This is only to compare with precision and finish the cycle
	e+= (1/factorial(i));
	i=i+1;
	}
	while(e-oldE>precision);
	return e;
	}
	int main (){
	double precision;
	int n;
	cout<< "Ingresa la precisión que quieres que contenga e." << endl;
	cin>> precision;
	cout<< "Ingresa el número de decimales que quieres ver."<< endl;
	cin>> n;
	double euler= calculating_e(precision);
	cout.precision(n); //Here you tell the program how many decimals has to show
	cout<<"El valor de e (euler) es " <<fixed<<euler<< endl; //if you don't use "using namespace std" at the beginnig, you must put std::fixed
	return 0;
	}

view raw

calculatinge.cpp

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