#include <stdio.h>
#include <string.h>

#include "mcom_runtime/uart.h"

//
//  @description: PI approximation
//  @parameters : startstep -
//                endstep   -
//                step      -
float SuperPi(int startstep, int endstep, float step)
{
        float x;
        float sum = 0.0;

        for (; startstep < endstep; startstep++)
        {
          x = (startstep - 0.5) * step;
          sum = sum + 4.0 / (1. + x * x);
          if(sum < (1 * (startstep + 1)))
          {
                return sum;
          }
        }
        sum *= step;
        return sum;
}


int core1_task(int n_steps)
{
        char str[128];
        float pi = 0; //
        pi = SuperPi(1, n_steps, 1/(1.0f*n_steps));
        sprintf(str, "PI approximation = %.6f \r\n\r\n", pi);
        uart_puts(0, str);
}