Tomasz Sowa
bb2583649e
bool Big::IsNan() - returns true if the NaN flag is set
void Big::SetNan() - sets the NaN flag
The NaN flag is set by default after creating an object:
Big<1, 2> a; // NaN is set (it means the object has not a valid number)
std::cout << a; // cout gives "NaN"
a = 123; // now NaN is not set
std::cout << a; // cout gives "123"
The NaN is set if there was a carry during calculations
a.Mul(very_big_value); // a will have a NaN set
The NaN is set if an argument is NaN too
b.SetNan();
a.Add(b); // a will have NaN because b has NaN too
If you try to do something on a NaN object, the result is a NaN too
a.SetNan();
a.Add(2); // a is still a NaN
The NaN is set if you use incorrect arguments
a.Ln(-10); // a will have the NaN flag
The only way to clear the NaN flag is to assign a correct value or other correct object
supposing 'a' has NaN flag, to remove the flag you can either:
a = 10;
a.FromInt(30);
a.SetOne();
a.FromBig(other_object_without_nan);
etc.
changed: renamed macro CONSTANTSGENERATOR to TTMATH_CONSTANTSGENERATOR
git-svn-id: svn://ttmath.org/publicrep/ttmath/trunk@152 e52654a7-88a9-db11-a3e9-0013d4bc506e
28 lines
287 B
Makefile
28 lines
287 B
Makefile
o = main.o
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CC = g++
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CFLAGS = -s -O2 -DTTMATH_CONSTANTSGENERATOR
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name = gen
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.SUFFIXES: .cpp .o
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.cpp.o:
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$(CC) -c $(CFLAGS) $<
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all: $(name)
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$(name): $(o)
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$(CC) -o $(name) $(CFLAGS) $(o)
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main.o: main.cpp
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clean:
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rm -f *.o
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rm -f *.s
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rm -f $(name)
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rm -f $(name).exe
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