Problem 1:

I have tried to print the value of PI upto n-th digit after decimal pointer in C++. But in MinGW after a certain-th digit the rest of them are showing 0s. But this is not happening with Cygwin.

Even for printing Armstrong numbers upto a certain range, 153 is not shown in output when executed through MinGW. But the results are absolutely fine with Cygwin.

Can anyone please tell me why there is such error in MinGW.

Code used for PI(n th):

#include "bits/stdc++.h"
#include <iostream>
#include <cstdlib>
using namespace std;
 
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);
}

int main()
{
    int N = 45;
 
    // Function that prints
    // the value of pi
    printValueOfPi(N);
    return 0;
}

Output with MinGW: Output with Cygwin:

Code for Armstrong:

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

#define cls system("cls");

int main(){
    // This is a template code

    int range,arm=0,digits=0;
    cin>>range;
    for (int i = 1; i <= range; i++)
    {
        int n=i;
        digits=arm=0;
        while(n!=0){
            n/=10;
            digits++;
        }
        n=i;
        while(n!=0){
            arm+=(pow((n%10),digits));
            n/=10;
        }
        if(arm==i){
            cout<<i<<endl;
        }
    }
    

    return EXIT_SUCCESS;
}

Output with MinGW: Output with Cygwin:

Problem 2:

Not only that I have another problem with Cygwin. If I copy the question test cases directly in the VS Code terminal or PowerShell and use to move with arrow keys of keyboard the shell start behaving like a text editor and if I press enter after that then the program just terminated throwing some error. If I avoid the arrow keys the result is fine.

Problem 2 details: https://youtu.be/x8RhxeGUroc