AAA

#include<stdio.h>
#include<conio.h>
#include<math.h>
main()
{
    float epsilon,pi;
    int i=1;
    printf("Nhap vao epsilon ");
    scanf("%f",&epsilon);
    while(1/(2*i+1)>epsilon)
    {pi = 4*(1+pow(-1,i)/(2*i+1));
    i++;
    }
    printf("%f la so pi",pi);
    getch();



}