X-Git-Url: https://hackdaworld.org/gitweb/?p=my-code%2Fatmel.git;a=blobdiff_plain;f=beginners%2Foneoverx.c;fp=beginners%2Foneoverx.c;h=8962bec52214a03e950bb45dc23130d2eb21e8be;hp=0000000000000000000000000000000000000000;hb=fbd9a8977b877a8186c74869c4e197f9baca3de8;hpb=6552af2f6025fc1fd8b9ee6af76ad663d0ec430b

diff --git a/beginners/oneoverx.c b/beginners/oneoverx.c
new file mode 100644
index 0000000..8962bec
--- /dev/null
+++ b/beginners/oneoverx.c
@@ -0,0 +1,28 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+int main(int argc,char **argv) {
+
+	int i;
+
+	double c,a,o,f;
+
+	a=atof(argv[1]);
+	c=(1.0-sqrt(1+4*a))/2.0; // -!
+	o=a/(1-c);
+
+	printf("; f(x) = a / (x+o)  +  c  (a:%f o:%f c:%f)\n",a,o,c);
+
+	for(i=255;i>=0;i--) {
+		f=a/(1.0*i/255+o)+c;
+		printf("; %d - %d\n",255-i,255-i+1);
+		printf(".db 0x%0x, ",(int)(f*255));
+		i-=1;
+		f=a/(1.0*i/255+o)+c;
+		printf("0x%0x\n",(int)(f*255));
+	}
+
+	return 0;
+}
+