Adding note to the qFuzzyCompare doc

Adding note about how comparing using 0.0 will fail, and
an example on how to do it.

Reviewed-by: David Boddie
Reviewed-by: Geir Vattekar

1 files changed, 8 insertions, 0 deletions

diff --git a/doc/src/snippets/code/src_corelib_global_qglobal.cpp b/doc/src/snippets/code/src_corelib_global_qglobal.cpp
index 72663e9..287181a 100644
--- a/doc/src/snippets/code/src_corelib_global_qglobal.cpp
+++ b/doc/src/snippets/code/src_corelib_global_qglobal.cpp
@@ -456,3 +456,11 @@ class MyClass : public QObject
 //! [45]
   QWidget w = QWidget();
 //! [45]
+
+//! [46]
+	// Instead of comparing with 0.0
+		qFuzzyCompare(0.0,1.0e-200); // This will return false
+	// Compare adding 1 to both values will fix the problem
+		qFuzzyCompare(1 + 0.0, 1 + 1.0e-200); // This will return true
+//! [46]
+