View Compilation Error

0_0_5456813_1570\Main.java:1: illegal character: \35
#include<stdio.h>
^
0_0_5456813_1570\Main.java:2: illegal character: \35
#define PI 3.1415927
^
0_0_5456813_1570\Main.java:6: class, interface, or enum expected
    while(scanf("%lf",&a)!=EOF)
    ^
0_0_5456813_1570\Main.java:9: class, interface, or enum expected
    printf("%.3lf\n",v);
    ^
0_0_5456813_1570\Main.java:10: class, interface, or enum expected
    }    
    ^
5 errors