View Compilation Error

0_0_38548444_27671\Main.java:1: 错误: 非法字符: '#'
#include "iostream"
^
0_0_38548444_27671\Main.java:1: 错误: 需要class, interface或enum
#include "iostream"
         ^
0_0_38548444_27671\Main.java:3: 错误: 需要class, interface或enum
int main(){
^
0_0_38548444_27671\Main.java:5: 错误: 需要class, interface或enum
    while(cin>>n){
    ^
0_0_38548444_27671\Main.java:8: 错误: 需要class, interface或enum
        else if(n>=80&&n<=89)
        ^
0_0_38548444_27671\Main.java:10: 错误: 需要class, interface或enum
        else if(n>=70&&n<=79)
        ^
0_0_38548444_27671\Main.java:12: 错误: 需要class, interface或enum
        else if(n>=60&&n<=69)
        ^
0_0_38548444_27671\Main.java:14: 错误: 需要class, interface或enum
        else if(n>=0&&n<=59)
        ^
0_0_38548444_27671\Main.java:16: 错误: 需要class, interface或enum
        else
        ^
0_0_38548444_27671\Main.java:18: 错误: 需要class, interface或enum
    }
    ^
0_0_38548444_27671\Main.java:20: 错误: 需要class, interface或enum
}
^
11 个错误