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

float factorial(float x);
float func(float fact_value);
int is_equal(float val1, float val2, float eps);

int main()
{
    float eps;
    float sum=0, i=1;
    printf("Enter epsilon: ");
    scanf("%f", &eps);
    while (is_equal(func(i), func(i-1), eps) != 1)
    {
        sum += func(i);
        // printf("%f is an element and %f is sum\n", func(i), sum);
        i++;
    }
    printf("Total sum is %f ", sum);
    getch();
    return 0;
}

float factorial(float x)
{
    float fact_value;
    for (int i = 1; i <= x; fact_value *= i++);
    if (x == 0)
        fact_value = 1;
    return fact_value;
}

float func(float fact_value)
{
    float func_value;
    return func_value = 1 / fact_value;
}

int is_equal(float val1, float val2, float eps)
{
    int result;
    result = fabs(val1 - val2) < eps;
    return result;
}