View Compilation Error

0_0_37394133_17732.cpp: In function 'int main()':
0_0_37394133_17732.cpp:8:12: error: '$n' was not declared in this scope
         if($n==0$) 
            ^
0_0_37394133_17732.cpp:8:16: error: unable to find numeric literal operator 'operator""$'
         if($n==0$) 
                ^
0_0_37394133_17732.cpp:8:16: note: use -std=gnu++11 or -fext-numeric-literals to enable more built-in suffixes