View Compilation Error

0_0_19393402_16681.cpp: In function 'int main()':
0_0_19393402_16681.cpp:35:13: error: unable to find numeric literal operator 'operator""sizeof'
   memset(fa,0.sizeof(fa));
             ^
0_0_19393402_16681.cpp:35:13: note: use -std=gnu++11 or -fext-numeric-literals to enable more built-in suffixes