View Compilation Error

0_0_26584305_12173.cpp: In function 'int main()':
0_0_26584305_12173.cpp:4:1: error: unable to find numeric literal operator 'operator""define'
 3define pi=3.1415926;
 ^
0_0_26584305_12173.cpp:4:1: note: use -std=gnu++11 or -fext-numeric-literals to enable more built-in suffixes
0_0_26584305_12173.cpp:6:17: error: unable to find numeric literal operator 'operator""pir'
 printf("%.3f\n",4pir^3/3);
                 ^
0_0_26584305_12173.cpp:6:17: note: use -std=gnu++11 or -fext-numeric-literals to enable more built-in suffixes
0_0_26584305_12173.cpp:8:1: error: expected ';' before '}' token
 }
 ^