CalculatePi.cpp

#include <iostream>
using namespace std;

float pi = 0.0;
float denominator = 1.0;
float operation = 1.0;

float pi_calculator(int terms) {
  for (int i = 0; i < terms; i++) {
    pi += operation * (4.0 / denominator);
    denominator += 2.0;
    operation *= -1.0;
  }
  return pi;
}

int main() {
  float result = pi_calculator(100000);
  cout << result;
}