struct Tpl<2> demo¶ template <> struct Tpl<2> { … } See Tpl<1> Note This is a note DFT equation is\[ X[k] = \sum_{n=0}^{N-1} x[n] , e^{-j \frac{2\pi}{N} k n} \] function tpl_foo() ¶ void tpl_foo() Defined at library.hpp:275 Defined at library.hpp:273