Quadruple precise variables?

[ihato]

I saw o Wikipedia that apart from normal floating points (float/double) there variables called Quadruple as well.

Why wasn't that included in C++?

[Moschops]

C++ doesn't specify how many bits must be used for a float or double. There's nothing in the language stopping a compiler writer using a 128 bit floating point number.

[Peter87]

On some compilers long double has quadruple precision.

[hanst99]

Quadruple just means that it has 4 times the precision of a float.