Task 8 is done?

2025.05.02/04Ex/comp.h

@@ -44,7 +44,7 @@ static inline int is_null (const double a)
 
 static inline int is_eps (const double a, const double eps)
 {
-	return (((a < 0) ? -a : a) - eps) < DBL_EPSILON;
+	return ((a < 0) ? -a : a) < eps;
 }
 
 #endif

2025.05.02/04Ex/solve.c

@@ -28,7 +28,8 @@ int t4_solve (
 
 	for (it = 1; it <= m; ++it)
 	{
-		c = b - ((b - a) / (y_b - y_a)) * y_b;
+		// c = b - ((b - a) / (y_b - y_a)) * y_b;
+		c = a - ((b - a) / (y_b - y_a)) * y_a;
 		y = f(c);
 		
 		if (is_eps(y, eps))

2025.05.02/08Ex/comp.h

@@ -0,0 +1,50 @@
+#ifndef COMP_H
+#define COMP_H
+
+#include <float.h>
+#include <math.h>
+
+static inline double * fpmax (double *pa, double *pb, double fa, double fb, double *max_f_p)
+{
+	if ((fa - fb) > DBL_EPSILON) 
+	{
+		*max_f_p = fa;
+		return pa;
+	} else
+	{
+		*max_f_p = fb;
+		return pb;
+	}
+}
+
+static inline double * fp_abs_max (double *pa, double *pb, double *fa, double *fb, double **max_f_p)
+{
+	if ((fabs(*fa) - fabs(*fb)) > DBL_EPSILON) 
+	{
+		*max_f_p = fa;
+		return pa;
+	} else
+	{
+		*max_f_p = fb;
+		return pb;
+	}
+}
+
+static inline int is_equal (const double a, const double b)
+{
+	double diff = a - b;
+	double max_val = (a > b) ? a : b;
+	return ((diff < 0) ? -diff : diff) < (DBL_EPSILON * max_val);
+}
+
+static inline int is_null (const double a)
+{
+	return ((a < 0) ? -a : a) < DBL_EPSILON;
+}
+
+static inline int is_eps (const double a, const double eps)
+{
+	return (((a < 0) ? -a : a) - eps) < DBL_EPSILON;
+}
+
+#endif

2025.05.02/08Ex/solve.c

@@ -6,17 +6,54 @@
 int t8_solve (
 		double (*f) (double), 
 		double a, double b, 
-		double eps, int m, double *x
+		double eps, int m, double *res
 ) {
 	int it = 1;
-	double x_l = 0, y_l = 0, c = a, y = f(a);
+	double h = a - b;
+	double x_l = 0, y_l = 0, x = a, y = f(a);
 
 	if (fabs(b - a) < DBL_EPSILON)
 	{
-		*x = a;
+		*res = a;
 		return 1;
 	}
 
+	while (it <= m)
+	{
+		h *= -0.1;
+
+		while (1)
+		{
+			it++;
+
+			if (it > m)
+				return -1;
+
+			x_l = x;
+			y_l = y;
+
+			x += h;
+
+			if ((a - x) > DBL_EPSILON || (x - b) > DBL_EPSILON) {
+				*res = x_l;
+				return it;
+			}
+
+			y = f(x);
+			if ((y_l - y) > DBL_EPSILON) {
+				if ((y_l - y) < eps) {
+					*res = x_l;
+					return it;
+				}
+				break;
+			}
+		}
+	}
+
+	return -1;
+}
+
+/*
 	for (double h = (b - a) * 0.1; fabs(h) > DBL_EPSILON; h *= -0.1)
 	{
 		do {
@@ -54,4 +91,4 @@ int t8_solve (
 
 	return it;
 }
-
+*/

2025.05.02/08Ex/solve.h

@@ -4,7 +4,7 @@
 int t8_solve (
 		double (*f) (double), 
 		double a, double b, 
-		double eps, int m, double *x
+		double eps, int m, double *res
 		);
 
 #endif

2025.05.02/tests/main_test.sh

@@ -1,5 +1,7 @@
 script_name="$(basename "$0")"
+
 iter="1000"
+eps="1e-14"
 
 if [ "$#" -ne 1 ]; then
 	echo "Не указан как параметр номер программы"
@@ -34,15 +36,15 @@ i=2
 for (( k = 3 ; k < 7; k++ )); do 
 	for (( a = -100 ; a < -40 ; a++ )); do 
 		for (( b = -9 ; b < 10 ; b++ )); do
-			echo "./a0$prog.out "$(echo "$a / 10" | bc -l)" "$(echo "$b / 10" | bc -l)" 1e-16 $iter $k"
-			echo "$i $(./a0$prog.out "$(echo "$a / 10" | bc -l)" "$(echo "$b / 10" | bc -l)" 1e-16 $iter $k)"
+			echo "./a0$prog.out "$(echo "$a / 10" | bc -l)" "$(echo "$b / 10" | bc -l)" $eps $iter $k"
+			echo "$i $(./a0$prog.out "$(echo "$a / 10" | bc -l)" "$(echo "$b / 10" | bc -l)" $eps $iter $k)"
 			((i+=2))
 		done
 	done
 	for (( a = -9 ; a < 10 ; a++ )); do 
 		for (( b = 11 ; b < 100 ; b++ )); do
-			echo "$i ./a0$prog.out "$(echo "$a / 10" | bc -l)" "$(echo "$b / 10" | bc -l)" 1e-16 $iter $k"
-			echo "$i $(./a0$prog.out "$(echo "$a / 10" | bc -l)" "$(echo "$b / 10" | bc -l)" 1e-16 $iter $k)"
+			echo "$i ./a0$prog.out "$(echo "$a / 10" | bc -l)" "$(echo "$b / 10" | bc -l)" $eps $iter $k"
+			echo "$i $(./a0$prog.out "$(echo "$a / 10" | bc -l)" "$(echo "$b / 10" | bc -l)" $eps $iter $k)"
 			((i+=2))
 		done
 	done