umeshtangnu

I am trying to write a program the approximates pi and outputs each value of pi based on how many terms and how often (for instance if you entered 10 terms and for each 2 steps then pi would output

the 2nd term for pi

the 4th term for pi

the 6th term for pi

the 8th term for pi

the 10th term for pi

I am having a really hard time with getting the "number" (2,4,6,8,10) to output and getting the pi value to be accurate based on how often. I don't understand loops very well. Can anyone help me learn about them or help guide me in the right direction. (should I be using for loops or while loops or do while loops I have no idea)

the 2nd term for pi

the 4th term for pi

the 6th term for pi

the 8th term for pi

the 10th term for pi

I am having a really hard time with getting the "number" (2,4,6,8,10) to output and getting the pi value to be accurate based on how often. I don't understand loops very well. Can anyone help me learn about them or help guide me in the right direction. (should I be using for loops or while loops or do while loops I have no idea)

Code: |

#include <iostream> #include <iomanip> #include <cmath> using namespace std; void printMessage(string); int returnNumber(string); int main() { char again; int termspi, steps, num; int countDenominator; float pi = 0.0, divisor = 0.0, count; const double NUMERATOR = 4.0; cout << " Program will approximate Pi "; cout << endl << endl; termspi = returnNumber ("Enter the number of terms to use: "); cout << endl << endl; steps = returnNumber("Display Pi after every how many steps?: "); cout << "RESULTS" << endl; int interval; interval += steps; for (count = 1.0, num = 1; num <= termspi; num++) { if (num % 2 == 0) pi -= NUMERATOR/count; else pi += NUMERATOR/count; if (steps != 0) steps = steps * interval; interval +=1; cout << fixed << showpoint; cout << steps << " PI = " << setprecision(9) << pi << endl; count += 2.0; } while (pi >= termspi) cout << pi << endl; do { cout << "Enter Y to run program again" << endl; cout << "(or any other key to exit)" << endl; cin >> again; } while ((again == 'Y') || (again == 'y')); return 1 ; } void printMessage(string msg) { cout << msg; } int returnNumber(string msg) { int num; cout << msg; cin >> num; while (num < 1){ cout << "Your input is not valid !!!" << endl; cout << "Please Re-enter a positive non zero number: "; cin >> num;} cout << endl; return num; } |