View Compilation Error

0_0_15326998_25981.cpp:1:11: error: #include expects "FILENAME" or <FILENAME>
 # include 
           ^
0_0_15326998_25981.cpp: In function 'int main()':
0_0_15326998_25981.cpp:7:22: error: 'scanf' was not declared in this scope
  while(scanf("%d", &n)!=EOF)
                      ^
0_0_15326998_25981.cpp:7:25: error: 'EOF' was not declared in this scope
  while(scanf("%d", &n)!=EOF)
                         ^
0_0_15326998_25981.cpp:11:22: error: 'printf' was not declared in this scope
  printf("%d\n\n", sum);
                      ^