Qt-interest Archive, July 2007
while we are at QCOMPARE...
Message 1 in thread
... I had a rather peculiar incident with it today:
float d1 = 0.1f;
float d2 = 0.2f;
float a = 0.3f;
const float b = 0.4f;
float p = 0.5f;
b1i->qblas_srotmg(&d1, &d2, &a, b, &p);
qDebug() << b;
QCOMPARE(b, 0.400000f);
where the method is void qblas_srotmg(float* d1, float* d2, float* a, const
float b, float* p), and this gives the quite surprising
QDEBUG : test::srotmg() 0.4
FAIL! : test::srotmg() Compared floats are not the same (fuzzy compare)
Actual (b): 0.375
Expected (0.400000f): 0.4
Puzzling. Any ideas what might be causing this ? Watching the qCompare code
does not give any easy explanations.
gcc version 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)
Qt 4.3.0 (debian lenny binary build, libqt4-* = 4.3.0-2+b1)
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