c++ program to calculate the value of pi

// C++ program to calculate the 
// value of pi up to n decimal 
// places 
#include "bits/stdc++.h" 
using namespace std; 
  
// Function that prints the 
// value of pi upto N 
// decimal places 
void printValueOfPi(int N) 
{ 
  
    // Find value of pi upto 
    // using acos() function 
    double pi = 2 * acos(0.0); 
  
    // Print value of pi upto 
    // N decimal places 
    printf("%.*lf\n", N, pi); 
} 
  
// Driver Code 
int main() 
{ 
    int N = 4; 
  
    // Function that prints 
    // the value of pi 
    printValueOfPi(N); 
    return 0; 
}