public void Start(int primer_number, double _a, double _b, double _accuracy)
{
this.a = _a;
this.b = _b;
this.primer = primer_number;
return_x rx = null;
switch (primer)
{
case 1:
{ rx = x => 7 / (x * x + 1); } break;
case 2:
{ rx = x => 2 * x * x; } break;
case 3:
{ rx = x => Math.Sin(x) * Math.Cos(x); } break;
case 4:
{ rx = x => 5 * x * x / 3; } break;
case 5:
{ rx = x => Math.Pow(Math.E, x); } break;
}
this.accuracy = _accuracy;
this.Solve(rx);
}
private void Solve(return_x rx)
{
while (true)
{
h = (b - a) / n;
for (int i = 0; i < n; i++)
{
if (i == 0)
{
answer1 = rx(a + i * h);
}
else if (i < n - 1)
{
answer1 += 2 * rx(a + i * h);
}
else
{
answer1 += (rx(a + i * h));
}
}
answer1 = h / 2 * answer1;
n = n * 2;
h = (b - a) / n;
for (int i = 0; i < n; i++)
{
if (i == 0)
{
answer2 = rx(a + i * h);
}
else if (i < n - 1)
{
answer2 += 2 * rx(a + i * h);
}
else
{
answer2 += (rx(a + i * h));
}
}
answer2 = h / 2 * answer2;
if (Math.Abs(answer2 - answer1) < accuracy)
{
this.n = n;
break;
}
else
{
n = n * 2;
}
}
}
