Task 8 is done

2025.05.02/08Ex/main.c

@@ -3,15 +3,13 @@
 #include <math.h>
 
 #include "init_f.h"
-#include "status.h"
 #include "solve.h"
 
 /* ./a.out a b eps M k */
 int main(int argc, char *argv[])
 {
 	double t, a, b, eps, x = 0;
-	int m, k, cl, it = 0, task = 8;
-	status ret;
+	int m, k, it, cl, task = 8;
 	
 	double (*f) (double);
 	double (*f_lst[]) (double) = {f0, f1, f2, f3, f4, f5, f6, sin}; // TODO: Remove sin
@@ -27,38 +25,25 @@ int main(int argc, char *argv[])
 			((sscanf(argv[5], "%d", &k) == 1) && ((0 <= k) && (k <= len_f))))
 	) {
 		fprintf(stderr, "Usage: %s a b eps M k\n", argv[0]);
-		return 1;
+		return -1;
 	}
 
 	f = f_lst[k];
 
 	t = clock();
-	ret = t8_solve(f, a, b, eps, m, &x, &it);
+	it = t8_solve(f, a, b, eps, m, &x);
 	t = (clock() - t) / CLOCKS_PER_SEC;
 		
 	cl = get_call_count();
 
-//	printf("x = %e\tf(x) = %e\n", x, f(x)); 
-
-	do {
-		switch (ret) 
-		{
-			case SUCCESS:
-				continue;
-			case RUN_TIME:
-				fprintf(stderr, "Error: with code %d - Not enough iterations!\n", ret);
-				break;
-			case EQUAL:
-				fprintf(stderr, "Error: with code %d - The dots degenerated into one!\n", ret);
-				break;
-		}
-		
+	if (it >= m)
+	{
 		fprintf(stdout, "%s : Task = %d NOT FOUND Count = %d T = %.2f\n", argv[0], task, cl, t);
-		return ret;
-	} while (0);
-
-	printf("%s : Task = %d X = %e Res = %e Its = %d Count = %d T = %.2f\n", argv[0], task, x, f(x), it, cl, t);
-
-	return 0;
+		return -2;
+	} else 
+	{
+		printf("%s : Task = %d X = %e Res = %e Its = %d Count = %d T = %.2f\n", argv[0], task, x, f(x), it, cl, t);
+		return 0;
+	}
 }
 

2025.05.02/08Ex/solve.c

@@ -1,8 +1,8 @@
 #include "solve.h"
-#include "status.h"
 
 #include <math.h>
 #include <float.h>
+#include <stdbool.h>
 
 
 int t8_solve (
@@ -11,54 +11,46 @@ int t8_solve (
 		double eps, int m, double *x
 ) {
 	int it = 0;
-	status ret = SUCCESS;
-	double c = DBL_MAX, y, y_a = f(a), y_b = f(b);
+	double x_l = 0, y_l = 0, c = a, y = f(a);
 
-	if (fabs(y_a) - eps < DBL_EPSILON)
+	if (fabs(b - a) < DBL_EPSILON)
 	{
 		*x = a;
-		return SUCCESS;
-	} if (fabs(y_b) - eps < DBL_EPSILON)
-	{
-		*x = b;
-		return SUCCESS;
-	} if (fabs(fabs(y_b) - fabs(y_a)) < DBL_EPSILON)
-	{
-		*x = a;
-		return EQUAL;
+		return 1;
 	}
 
-	for (it = 0; it < m; ++it)
+	for (double h = (b - a) * 0.1; fabs(h) > DBL_EPSILON; h *= -0.1)
 	{
-		double h = (b - a) * 0.1;
-		c = a + h;
-		y = f(c);
+		do {
+			if (it >= m)
+				break;
+
+			it++;
+			x_l = c;
+			y_l = y;
+			
+			c += h;
+			y = f(c);
+		} while (((y - y_l) - eps) > DBL_EPSILON);
 		
-		if (fabs(y) - eps < DBL_EPSILON)
-		{
-			ret = SUCCESS;
+		if (it >= m)
 			break;
-		} else if (fabs(y_a) - fabs(y_b) > DBL_EPSILON)
+
+		if ((c - b) > DBL_EPSILON)
 		{
-			a = c;
-			y_a = y;
-		} else if (fabs(y_b) - fabs(y_a) > DBL_EPSILON)
+			x_l = b;
+			y_l = f(b);
+			break;
+		} else if ((a - c) > DBL_EPSILON)
 		{
-			b = c;
-			y_b = y;
-		} else
-		{
-			ret = EQUAL;
+			x_l = a;
+			y_l = f(b);
 			break;
 		}
 	}
 	
-	if (it >= m)
-		ret = RUN_TIME;
-	
-	*x = c;
-	*m_it = it;
+	*x = x_l;
 
-	return ret;
+	return it;
 }
 

2025.05.02/08Ex/solve.h

@@ -1,12 +1,10 @@
 #ifndef SOLVE_H
 #define SOLVE_H
 
-#include "status.h"
-
-status t8_solve (
+int t8_solve (
 		double (*f) (double), 
 		double a, double b, 
-		double eps, int m, double *x, int *m_it
+		double eps, int m, double *x
 		);
 
 #endif