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#include <iostream>
int main()
    {
int arr[5]{};
const int (&)ref=arr[5];
for(int i=0;i<5;i++)
std::cout<<ref[i]<<" ";
std::cout<<endl<<std::endl;
return 0;
}
 

prog.cpp: In function ‘int main()’:
prog.cpp:5:1: error: expected primary-expression before ‘const’
 const int (&)ref=arr[5];
 ^~~~~
prog.cpp:7:12: error: ‘ref’ was not declared in this scope
 std::cout<<ref[i]<<" ";
            ^~~
prog.cpp:8:12: error: ‘endl’ was not declared in this scope
 std::cout<<endl<<std::endl;
            ^~~~
prog.cpp:8:12: note: suggested alternative:
In file included from /usr/include/c++/6/iostream:39:0,
                 from prog.cpp:1:
/usr/include/c++/6/ostream:590:5: note:   ‘std::endl’
     endl(basic_ostream<_CharT, _Traits>& __os)
     ^~~~

Standard output is empty