View Compilation Error

0_0_21657713_10632.cpp:1:31: error: stray '#' in program
 <span style="font-size:18px;">#include<bits/stdc++.h>
                               ^
0_0_21657713_10632.cpp:1:1: error: expected unqualified-id before '<' token
 <span style="font-size:18px;">#include<bits/stdc++.h>
 ^
0_0_21657713_10632.cpp: In function 'int solve(int, int)':
0_0_21657713_10632.cpp:7:23: error: 'swap' was not declared in this scope
     if(x < y) swap(x,y);
                       ^
0_0_21657713_10632.cpp: In function 'int main()':
0_0_21657713_10632.cpp:14:5: error: 'cin' was not declared in this scope
     cin>>T;
     ^
0_0_21657713_10632.cpp:17:27: error: 'scanf' was not declared in this scope
         scanf("%d%d",&x,&y);
                           ^
0_0_21657713_10632.cpp:18:28: error: '__gcd' was not declared in this scope
         int gcd = __gcd(x,y);   //库中已有的函数，<span style="color:#FF0000;">注意poj中要手写__gcd() 
                            ^
0_0_21657713_10632.cpp:21:50: error: 'printf' was not declared in this scope
         printf("Case #%d: %d\n",kase++,solve(x,y));
                                                  ^