Question

C++ I need help assigning values. I have to calculate pi using the infinite series so I created a loop but I'm unsure of how to assign the value to "picalcualted" so I can print it out on screen.

Answer 1

Not sure how correct this is but here's what I have so far.
#include <iostream>
#include <fstream>
#include <cmath>
#include <iomanip>
#include <string>

using namespace std;
int main ()

{
float pitrue = acos(-1);
int n;
cout << "Enter the accuracy to compute pi." << endl;
cin >> n;
cout << "Pi True" << setw(50) << "Pi Calculated" << endl;
cout << setprecision (n) << pitrue << endl;
double picalculated;
while (fabs(pitrue-picalculated) >= pow(10.0,-1*n));
{
for (int count = 1; count <= n; count++)
{
if (count == 1)
{
picalculated = 4.0;
}
else if (count % 2 == 1.0)
{
picalculated = 4.0 + (4/((2 * count) - 1.0));
}
else
{
picalculated = 4.0 - (4/((2 * count) - 1.0));
}
}

}

system ("PAUSE");
return 0;
}