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Task 5 is done

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AZEN-SGG 2025-05-07 18:33:55 +03:00
parent 8e6617686b
commit 83289ac7ad
1 changed files with 10 additions and 54 deletions
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64
2025.05.02/05Ex/solve.c
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@ -12,7 +12,7 @@ int t5_solve (
double eps, int m, double *x
) {
int it;
double c = (a + b) / 2;
double c = (a + b) * 0.5;
double y_a = f(a);
double y_c = f(c);
@ -34,61 +34,17 @@ int t5_solve (
for (it = 1; it < m+1; ++it)
{
double x_new, y_new, *temp_pnt = 0, *inner_max_pnt;
const double m_1 = (y_c - y_a) / (c - a);
const double m_2 = (y_b - y_c) / (b - c);
double *temp_pnt = 0, *inner_max_pnt;
const double angle = (c - a) / (y_c - y_a);
const double x_new = a -
angle * y_a +
((((b - c) / (y_b - y_c)) - angle) / (y_b - y_a)) * y_a * y_c;
const double y_new = f(x_new);
const double A = (m_2 - m_1) / (b - a);
const double B = m_1 - A * (a + c);
const double C = y_a - a * m_1 + A * a * c;
const double D = B * B - 4 * A * C;
if (is_null(A))
return -3;
else if (D < -DBL_EPSILON)
return -1;
else if (D > DBL_EPSILON)
if (is_eps(y_new, eps))
{
const double sqrt_D = sqrt(D);
const double inv_A = 1./(2 * A);
double x_1 = (-B + sqrt_D) * inv_A;
double x_2 = (-B - sqrt_D) * inv_A;
double y_x_1 = f(x_1);
double y_x_2 = f(x_2);
if (is_eps(y_x_1, eps))
{
*x = x_1;
return it;
} else if (is_eps(y_x_2, eps))
{
*x = x_2;
return it;
} else if (y_x_2 - y_x_1 > DBL_EPSILON)
{
x_new = x_1;
y_new = y_x_1;
} else
{
x_new = x_2;
y_new = y_x_2;
}
} else
{
double x_1 = -B / (2 * A);
double y_x_1 = f(x_1);
if (is_eps(y_x_1, eps))
{
*x = x_1;
return it;
}
x_new = x_1;
y_new = y_x_1;
*x = x_new;
return it;
}
if (