Igor_Lab_3_v2

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

int main()
{
    float x, y, e, q, k = 0, s = 0;
    printf("Input x, if 0<|x|<1, input e, if 0<e<0.0001\n");
    scanf("%f%f", &x, &e);

    y = cos(x);

    do {
        int fact = 1, n = 2*k;

        for (int c = 1; c <= n; c++){
            fact = fact * c;
        }

        s += pow(-1, k) * pow(x, (2*k))/fact;
        k++;
    } while(fabs(s - y)>e);

    q = fabs(s - y);
    printf("Y(x) = %0.10f\nS(x) = %0.10f\n|S(x) - Y(x)| = %0.10f\n", y, s, q);
    getch();
    return 0;
}