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



float func(float x);
float sum(float x, float eps);
void main()
{
float x,y,s,eps;
printf("Vvedite eps: ");
scanf("%f", &eps);
if (eps<0) eps=0;
for (x = 0.5; x <= 0.751; x=x+0.05) {
 s=sum(x,eps);
 y=func(x);
 printf("x=%4.2f => s=%f, y=%f \n", x, s, y);
}
getch();
return;
}
//
float func(float x)
 {
 return (1-cos(x))/x/x-sin(x)/x+0.5;}

//
float sum(float x, float eps)
 {
 int n;
 float t,a,b;
 t=0;
 n=1;
 a=-1;
 while (fabs(a)>eps)
  {b=-x*x/(2*n-1)/(2*n+2)/2;
  a=a*b;
  t=t+a;
  n=n+1;}
 return t;}