Find an Error

2025.05.02/02Ex/init_f.h

@@ -1,28 +1,13 @@
 #ifndef INIT_F_H
 #define INIT_F_H
 
-int get_call_function_count (void) ;
-int get_call_derivative_count (void);
-
+int get_call_count (void); 
 double f0 (double x);
-double d0 (double x);
-
 double f1 (double x);
-double d1 (double x);
-
 double f2 (double x);
-double d2 (double x);
-
 double f3 (double x);
-double d3 (double x);
-
 double f4 (double x);
-double d4 (double x);
-
 double f5 (double x);
-double d5 (double x);
-
 double f6 (double x);
-double d6 (double x);
 
 #endif

2025.05.02/03Ex/init_f.c

@@ -26,34 +26,34 @@ double f1 (double x)
 
 double f2 (double x)
 {
-	// double x_2 = x * x;
+	double x_2 = x * x;
 	cl++;
-	return 4 - x * x;
+	return 4 - x_2;
 }
 
 double f3 (double x)
 {
-	//double x_2 = x * x;
-	//double x_3 = x * x_2;
+	double x_2 = x * x;
+	double x_3 = x * x_2;
 	cl++;
 
-	return x * x * x + 3 * x * x + 16;
+	return x_3 + 3 * x_2 + 16;
 }
 
 double f4 (double x)
 {
-	//double x_2 = x * x;
-	//double x_4 = x_2 * x_2;
+	double x_2 = x * x;
+	double x_4 = x_2 * x_2;
 	cl++;
 
-	return 3 - 2 * x * x - x * x * x * x;
+	return 3 - 2 * x_2 - x_4;
 }
 
 double f5 (double x)
 {
-	//double sq_x = sqrt(fabs(x) + 1);
+	double sq_x = sqrt(fabs(x) + 1);
 	cl++;
-	return sqrt(fabs(x) + 1) - 2;
+	return sq_x - 2;
 }
 
 double f6 (double x)

2025.05.02/03Ex/solve.c

@@ -40,7 +40,10 @@ int t3_solve (
 	
 	for (it = 1; it <= m; ++it)
 	{
-		c = a - ((a - b) / (y_a - y_b)) * y_a;
+		if (fabs(y_b) < fabs(y_a))
+			c = b - ((a - b) / (y_a - y_b)) * y_b;
+		else
+			c = a - ((a - b) / (y_a - y_b)) * y_a;
 		y = f(c);
 		
 		memcpy(&bits, &y, sizeof(bits));

2025.05.02/05Ex/solve.c

@@ -40,8 +40,7 @@ int t5_solve (
 		return -1;
 
 	if (
-		is_equal(y_a, y_b) ||
-		is_equal(y_a, y_c) ||
+		(is_equal(y_a, y_b) || is_equal(y_a, y_c)) ||
 		is_equal(y_b, y_c)
 	   )
 		return -3;
@@ -49,11 +48,26 @@ int t5_solve (
 	for (it = 1; it < m+1; ++it)
 	{
 		double *temp_pnt = 0, *inner_max_pnt;
-		const double angle = (c - a) / (y_c - y_a);
-		const double x_new = a - 
+		double angle, x_new, y_new;
+		
+		if (is_equal(y_a, y_b))
+			return -3;
+		else if (is_equal(y_a, y_c))
+			return -3;
+		else if (is_equal(y_b, y_c))
+			return -3;
+
+		if (
+			(is_equal(y_a, y_b) || is_equal(y_a, y_c)) ||
+			is_equal(y_b, y_c)
+		)
+			return -3;
+
+		angle = (c - a) / (y_c - y_a);
+		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);
+		y_new = f(x_new);
 
 		if (is_eps(y_new, eps))
 		{
@@ -62,15 +76,15 @@ int t5_solve (
 		}
 
 		if (
-			is_equal(x_new, a) ||
-			is_equal(x_new, c) ||
+			(is_equal(x_new, a) ||
+			is_equal(x_new, c)) ||
 			is_equal(x_new, b)
 		   )
 			return -1;
 
 		if (
-			is_equal(y_new, y_a) ||
-			is_equal(y_new, y_c) ||
+			(is_equal(y_new, y_a) ||
+			is_equal(y_new, y_c)) ||
 			is_equal(y_new, y_b)
 		   )
 			return -3;

2025.05.02/05Ex/solve.h

@@ -3,6 +3,9 @@
 
 #include <math.h>
 #include <float.h>
+#include <stdio.h>
+
+#define EPS 1e-16
 
 static inline double * fpmax (double *pa, double *pb, double fa, double fb, double *max_f_p)
 {
@@ -34,7 +37,7 @@ 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);
+	return (fabs(diff) < (EPS * fabs(max_val)));
 }
 
 static inline int is_null (const double a)