View Compilation Error

0_0_26585769_26858.cpp: In function 'int main()':
0_0_26585769_26858.cpp:9:24: error: unable to find numeric literal operator 'operator""a'
   if(a>b) {printf("%d",2a+b);}
                        ^
0_0_26585769_26858.cpp:9:24: note: use -std=gnu++11 or -fext-numeric-literals to enable more built-in suffixes
0_0_26585769_26858.cpp:10:21: error: unable to find numeric literal operator 'operator""b'
   else {printf("%d",2b+a);}
                     ^
0_0_26585769_26858.cpp:10:21: note: use -std=gnu++11 or -fext-numeric-literals to enable more built-in suffixes