//varianta cu functie care calculeaza factorialul lui n
int fact(int n)
{
    if(n==0) return 1;
    else return n*fact(n-1);
}

float e(float eps)
{
    float s=0;
    int n=0;
    while(1.0/fact(n)>=eps)//cat timp ultimul termen >=eps
    {
        s=s+1.0/fact(n);//il adunam la suma
        n++;//marim n
    }
    return s;
}
//varianta fara functie de factorial
float e2(float eps)
{
    float s=1;
    int n=1,f=1;
    while(1.0/f>=eps)//cat timp ultimul termen >=eps
    {
        s=s+1.0/f;//adunam ultimul termen
        n++;//marim n
        f=f*n;//recalculam factorialul
    }
    return s;
}