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#include <iostream>
using namespace std;
 
int m1[]={0,2,4,6};
int m2[]={1,3,5,7};
 
int (*fun)(int n)[end (m1)-begin (m1)]{
return  (n%2!=0 ) ? &m1 : m2;}
 
int main  (){
int c;
cin>>c;
//int (*p)[sizeof (m1)/sizeof (m1[0])]=fun (c);
 int (*p)[end (m1)-begin (m1)]=fun (c);
cout <<*p;
}
 

prog.cpp:7:38: error: ‘fun’ declared as function returning an array
 int (*fun)(int n)[end (m1)-begin (m1)]{
                                      ^
prog.cpp:8:1: error: expected primary-expression before ‘return’
 return  (n%2!=0 ) ? &m1 : m2;}
 ^~~~~~
prog.cpp:8:1: error: expected ‘}’ before ‘return’
prog.cpp:8:30: error: expected declaration before ‘}’ token
 return  (n%2!=0 ) ? &m1 : m2;}
                              ^

Standard output is empty