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

double f(double x, double eps)
{
    double v, sum = x;
    long n = 1;
    double fn = pow(x,3)/6.0;
    while(eps < fabs(fn))
    {
        sum += fn;
        n   += 1;
        fn *= (2*n - 1)*(2*n - 1)*x*x;
        fn /= 2*n*(2*n + 1);
    }
    return sum;
}

int main()
{
    char sign[] = " ";
    double x, fx, dx = 0, xn = 0, xk = 0, eps = 0;
    printf("Enter xn : ");scanf("%lf",&xn);
    printf("Enter xk : ");scanf("%lf",&xk);
    printf("Enter dx : ");scanf("%lf",&dx);
    printf("Enter eps: ");scanf("%lf",&eps);
    printf("|-----------------------------------|\n");
    printf("|    x   |  f(x)  |  asin |(sin-f)/f|\n");
    printf("|-----------------------------------|\n");
    for(x = xn; x <= xk; x += dx)
    {
        fx = f(x,eps);
        if(x < 0)
            sign[0] = '\0';
        else
            sign[0] = ' ';
        printf("|%s%.4f |%s%.4f |%s%.4f|%s%.4f  |\n",
            sign,x,sign,fx,sign,asin(fx),sign,(sin(x) != 0 ? fabs(sin(x) - fx)/sin(x) : 0));
    }
    printf("|-----------------------------------|\n");
    printf("Press any key to continue\n");
    getch();
    return 0;
}