From 3006e6cca44b06779068099eead7cac16e80ca71 Mon Sep 17 00:00:00 2001
From: Orestis <orestis.malaspinas@hesge.ch>
Date: Fri, 2 Oct 2020 11:50:20 +0200
Subject: [PATCH] added zero
---
exemples/zero.c | 28 ++++++++++++++++++++++++++++
1 file changed, 28 insertions(+)
create mode 100644 exemples/zero.c
diff --git a/exemples/zero.c b/exemples/zero.c
new file mode 100644
index 0000000..34df9cd
--- /dev/null
+++ b/exemples/zero.c
@@ -0,0 +1,28 @@
+#include <stdio.h>
+#include <math.h>
+#include <stdlib.h>
+
+double f(double x) {
+ return x * x - 25.0;
+}
+
+double next_x(double x1, double x2, double (*foo)(double)) {
+ return x1 - (x2-x1)/(foo(x2)-foo(x1))*foo(x1);
+}
+
+int main() {
+ const int max_iter = 1000;
+ double x1 = rand();
+ double x2 = rand();
+ printf("x1 = %f, x2 = %f\n", x1, x2);
+ for (int i = 0; i < max_iter; ++i) {
+ double x3 = next_x(x1, x2, f);
+ x1 = x2;
+ x2 = x3;
+ printf("x3 = %f, f(%f) = %f, at iter = %d\n", x3, x3, f(x3), i);
+ if (fabs(f(x3)) < 0.00001 ) {
+ return EXIT_SUCCESS;
+ }
+ }
+ return EXIT_FAILURE;
+}
\ No newline at end of file
--
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