View Compilation Error

0_0_13726407_3183.cpp:2:4: error: stray '#' in program
  2 #include<stdio.h>
    ^
0_0_13726407_3183.cpp:3:4: error: stray '#' in program
  3 #include<algorithm>
    ^
0_0_13726407_3183.cpp:4:4: error: stray '#' in program
  4 #include<math.h>
    ^
0_0_13726407_3183.cpp:5:4: error: stray '#' in program
  5 #define PI 3.14159265
    ^
0_0_13726407_3183.cpp:2:2: error: expected unqualified-id before numeric constant
  2 #include<stdio.h>
  ^
0_0_13726407_3183.cpp:7:2: error: expected unqualified-id before numeric constant
  7 struct line
  ^
0_0_13726407_3183.cpp:12:5: error: 'a' does not name a type
 12 }a[1010],b[1010];
     ^
0_0_13726407_3183.cpp:13:1: error: expected unqualified-id before numeric constant
 13 double comp(line i,line j)
 ^
0_0_13726407_3183.cpp:19:1: error: expected unqualified-id before numeric constant
 19 double comp1(line i,line j)
 ^