View Compilation Error

0_0_21768491_18134.cpp:1:1: error: 'include' does not name a type
 include <bits/stdc++.h>
 ^
0_0_21768491_18134.cpp: In function 'int main()':
0_0_21768491_18134.cpp:15:18: error: 'scanf' was not declared in this scope
     scanf("%d",&T);
                  ^
0_0_21768491_18134.cpp:26:27: error: 'sort' was not declared in this scope
         sort(e+1,e+n+1,cmp);
                           ^
0_0_21768491_18134.cpp:30:27: error: 'printf' was not declared in this scope
                 printf(" ");
                           ^
0_0_21768491_18134.cpp:35:38: error: 'printf' was not declared in this scope
                    printf("%d",e[j].a);
                                      ^
0_0_21768491_18134.cpp:40:16: error: 'puts' was not declared in this scope
         puts("");
                ^