Minh PI

#include <stdio.h>
#include <conio.h>
#include <math.h>

main()
{
    float epsilon, pi = 0;
    int i = 0;
    printf("Nhap vao epsilon: ");
    scanf("%f", &epsilon);
    while(float(1)/(2 * i + 1) > epsilon) {
        pi = pi + 4 * pow(-1, i) / (2 * i + 1));
        i++;
    }
    printf("%f la so pi", pi);
    getch();

}