View Compilation Error

0_0_38550804_20340.cpp: In function 'int main(int, char**)':
0_0_38550804_20340.cpp:10:21: error: unable to find numeric literal operator 'operator""B'
   j=(x1-x2)*(x1-x2)%2B(y1-y2)*(y1-y2);
                     ^
0_0_38550804_20340.cpp:10:21: note: use -std=gnu++11 or -fext-numeric-literals to enable more built-in suffixes