c++找偶数抽象版

#include <bits/stdc++.h>
#define a using
#define b namespace
#define c std
#define d ;
#define e double
#define f ,
#define g int
#define h main
#define i ()
#define j {
#define k cin
#define l >>
#define o cout
#define p <<
#define q +
#define r return
#define s 0
#define t }
#define u ;
a b c d
e n f m d
g h i
j
   k l m l n d
   o p n q m d
   r s u
t