fix build-CI

examples/fraction_exhaustive/fraction_exhaustive.ino

@@ -3,13 +3,16 @@
 //  AUTHOR: Rob Tillaart
 // PURPOSE: exhaustive fraction testing
 //     URL: https://github.com/RobTillaart/Fraction
+//
+//  Adjust accuracy if needed.
 
 #include "fraction.h"
 
 uint32_t start, stop;
-
 float maxError = 0;
-uint32_t lastTime = 0;
+
+//  step size to test, typical 100000
+uint32_t N = 10000;
 
 void setup()
 {
@@ -22,28 +25,28 @@ void setup()
 
   start = millis();
 
-  //  test 0.00000 .. 1.00000
-  for (uint32_t n = 0; n <= 100000; n++)
+  for (uint32_t n = 0; n <= N; n++)
   {
-    float g = n * 1e-5;
+    float g = n * (1.0 / N);
     Fraction frac( g );
     float f = frac.toFloat();
     //  test for relative error 1e-4 = 0.01%
     //  find the maxError so far.
     float relError = abs(abs(f / g) - 1);
     // float absError = abs(f - g);
-    if (relError > maxError)
+    // if (relError > maxError)
     {
       maxError = relError;
       Serial.print(n);
       Serial.print("\t");
-      Serial.print(frac.toString());
-      Serial.print("\t\t");
-      Serial.print(f, 6);
-      Serial.print("\t\t");
       Serial.print(g, 6);
-      Serial.print("\t\t");
-      Serial.println(relError, 6);
+      Serial.print("\t");
+      Serial.print(f, 6);
+      Serial.print("\t");
+      Serial.print(100 * relError, 2);  //  as percentage
+      Serial.print("\t");
+      Serial.print(frac.toString());
+      Serial.println();
     }
   }
   stop = millis();