View Compilation Error

0_0_18476508_19801.cpp:2:4: error: stray '#' in program
  2 #include <cstdio>
    ^
0_0_18476508_19801.cpp:3:4: error: stray '#' in program
  3 #include <cmath>
    ^
0_0_18476508_19801.cpp:7:4: error: stray '#' in program
  7 #define PI acos(-1.0)
    ^
0_0_18476508_19801.cpp:2:2: error: expected unqualified-id before numeric constant
  2 #include <cstdio>
  ^
0_0_18476508_19801.cpp:6:2: error: expected unqualified-id before numeric constant
  6 
  ^