View Compilation Error

0_0_27012333_19430.cpp:1:10: error: #include expects "FILENAME" or <FILENAME>
 #include 
          ^
0_0_27012333_19430.cpp:2:11: error: '::main' must return 'int'
 void main()
           ^
0_0_27012333_19430.cpp: In function 'int main()':
0_0_27012333_19430.cpp:5:21: error: 'scanf' was not declared in this scope
  while(scanf("%d",&n)!=EOF)
                     ^
0_0_27012333_19430.cpp:5:24: error: 'EOF' was not declared in this scope
  while(scanf("%d",&n)!=EOF)
                        ^
0_0_27012333_19430.cpp:18:24: error: 'printf' was not declared in this scope
     printf("%d\n\n",sum);
                        ^
0_0_27012333_19430.cpp:22:22: error: 'printf' was not declared in this scope
     printf("%d\n",sum);
                      ^