View Compilation Error

0_0_20066346_5109\Main.java:1: 错误: 非法字符: '#'
#include<cstdio>
^
0_0_20066346_5109\Main.java:1: 错误: 需要class, interface或enum
#include<cstdio>
        ^
0_0_20066346_5109\Main.java:5: 错误: 需要class, interface或enum
    while(scanf("%d%d", &a,&b) != EOF)
    ^
0_0_20066346_5109\Main.java:8: 错误: 需要class, interface或enum
    }
    ^
4 个错误