This article discusses creation of Expert Advisors using the UML graphical language, which is used for visual modeling of object-oriented software systems. The main advantage of this approach is the visualization of the modeling process. The article contains an example that shows modeling of the structure and properties of an Expert Advisor using the Software Ideas Modeler.
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Hi!
I have experienced strange problem in 64bit version of MT5 when the function is imported from the external library.
I have created a sample function in C:
double __stdcall test_double(double d)
{
return (d*1.22);
}
and declared it in MQL:
double test_double(double d);
When invoked in MQL like that:
Print ("test_double:"+test_double(100));
I got:
2010.10.11 18:12:42 double_bug (EURUSD,H1) test_double:-1.#IND
The very same code works like a charm when recompiled for an run under 32 bit MT5 platform.
It's very strange as double and float data types are standard across all platforms and do not depend on the architecture.
Later I redefined the routine to:
double __stdcall test_double(double d)
{
return (1.22);
}
And got the very same result.
Looks like a terminal bug.