#WSQ14

#include <iostream>
#include <cmath>
using namespace std;

long double precision( int n, long double e)
{
if (n == 0){
return ceil (e);
} else if (n == 1){
return floor ((e * 10 ) + 0.5) / 10;
}else if ( n ==2){
return ceil((e * 100 ) + 0.05) / 100;
} else if ( n == 3){
return floor ((e * 1000 ) + 0.005) / 1000;
} else if (n == 4){
return floor ((e * 10000 ) + 0.0005) / 10000;
}else {
return e;
}
}

long double calculate_e (){
long double e = 2.5;
long double c = 2.0;
long double d, factorial;
for (int i=0;i<5;i++){
c = c + 1.0;
d = c;
factorial = c;
while (d>1){
d = d – 1.0;
factorial = factorial * d;
}
e = e + (1.0/factorial);
}
return e;
}

int main(){
int n;
cout << “numero de decimales que desees entre 0 y 5″<< endl;
cin>> n;
long double e = calculate_e ();
long double e2 = precision(n, e);
cout << e2 << endl;
return 0;
}

This one was really difficult, at first I didn’t understand what to do but I read the link that was on the wsq and read other post to understand what to do.

#WSQ14 by alan46bc is licensed under a Creative Commons Attribution 4.0 International License.