Absolutly wrong done Task 5

2025.05.02/06Ex/solve.c

@@ -0,0 +1,103 @@
+#include "solve.h"
+
+#include <math.h>
+#include <float.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <string.h>
+
+int t1_solve (
+		double (*f) (double), 
+		double a, double b, 
+		double eps, int m, double *x
+) {
+	int it = 0;
+	uint64_t bits;
+	double c = DBL_MAX, y, y_a = f(a), y_b = f(b);
+	bool sgn_a, sgn_b, sgn_c;
+
+	memcpy(&bits, &y_a, sizeof(bits));
+	sgn_a = (bits >> 63) & 1;
+	memcpy(&bits, &y_b, sizeof(bits));
+	sgn_b = (bits >> 63) & 1;
+
+	if (fabs(y_a) - eps < DBL_EPSILON)
+	{
+		*x = a;
+		return 1;
+	} if (fabs(y_b) - eps < DBL_EPSILON)
+	{
+		*x = b;
+		return 1;
+	}
+
+	if (sgn_a == sgn_b)
+	{
+		*x = DBL_MAX;
+		return -1;
+	}
+	
+	for (it = 1; it <= m; ++it)
+	{
+		c = (a + b) * 0.5;
+		y = f(c);
+		
+		memcpy(&bits, &y, sizeof(bits));
+		sgn_c = (bits >> 63) & 1;
+		
+		if (fabs(y) - eps < DBL_EPSILON)
+			break;
+		else if ((fabs(c - a) < DBL_EPSILON) || (fabs(c - b) < DBL_EPSILON))
+			it = m+1;
+		else if (sgn_c == sgn_a)
+		{
+			a = c;
+			y_a = y;
+		} else if (sgn_c == sgn_b)
+		{
+			b = c;
+			y_b = y;
+		}
+	}
+	
+	if (it > m)
+		it = -1;
+	
+	*x = c;
+
+	return it;
+}
+
+
+
+int t6_solve (
+		double (*f) (double), 
+		const int m, double *d
+		double a, double b, 
+		const double eps, const int M, double *x
+) {
+	const int len = m + 1;
+
+	double *y_lst = d;
+	double *x_lst = d + len;
+	double *t_lst = d + (len << 1);
+	
+	double last_x = a;
+	double last_y = f(a);
+	const int h = (b - a) / m;
+	
+	y_lst[0] = last_y;
+	x_lst[0] = last_x;
+	t_lst[0] = last_x;
+
+	for  (int i = 1, double t_x = a ; i < len ; i++, t_x += h)
+	{
+		double t_y = f(t_x);
+
+		y_lst[i] = t_y;
+		x_lst[i] = t_x;
+
+		
+	}
+
+}