View Compilation Error

0_0_20881820_18110.cpp:1:1: error: 'include' does not name a type
 include<stdio.h> 
 ^
0_0_20881820_18110.cpp: In function 'int main()':
0_0_20881820_18110.cpp:7:24: error: 'scanf' was not declared in this scope
     while(scanf("%d",&n),n)
                        ^
0_0_20881820_18110.cpp:20:35: error: 'printf' was not declared in this scope
         printf("%.1lf\n",fabs(sum));
                                   ^