Help me please. Something is wrong here)

Question

#include<stdio.h>
#include<conio.h>
#include<math.h>
int main()
{
double a = 0.1, b = 1.0, h = 0.1, x, S(0), Y;
int k, n;
printf("vvedite n");
scanf_s("%d", &n);
printf("\t S(x)\t | \tY(x)\t|\tY(x)-S(x)\t|\n");
for (x = a;x <= b;)
{
k = 0;
while(k<=n)
{
S += cos(k*x) / k;
k++;
}
Y = exp(cos(x))*cos(sin(x));
printf("\t%.3f\t|\t%.3f\t|\t%.3f\t\t|\n", S, Y, S - Y);
x += h;
}
_getch();
}