View Compilation Error

0_0_28518266_10912\Main.java:1: 错误: 非法字符: '#'
#include <stdio.h>
^
0_0_28518266_10912\Main.java:1: 错误: 需要class, interface或enum
#include <stdio.h>
         ^
0_0_28518266_10912\Main.java:2: 错误: 非法字符: '#'
#include <cmath>
^
0_0_28518266_10912\Main.java:3: 错误: 非法字符: '#'
#include <iostream>
^
0_0_28518266_10912\Main.java:7: 错误: 需要class, interface或enum
int main(void)
^
0_0_28518266_10912\Main.java:10: 错误: 需要class, interface或enum
    cin >> n;
    ^
0_0_28518266_10912\Main.java:12: 错误: 需要class, interface或enum
    while (n-->0)
    ^
0_0_28518266_10912\Main.java:15: 错误: 需要class, interface或enum
        cin >> t;
        ^
0_0_28518266_10912\Main.java:16: 错误: 需要class, interface或enum
        printf("%.lf\n", pow(3, t));
        ^
0_0_28518266_10912\Main.java:17: 错误: 需要class, interface或enum
    }
    ^
0_0_28518266_10912\Main.java:19: 错误: 需要class, interface或enum
}
^
11 个错误