View Compilation Error

0_0_34569102_29461.cpp:5:9: error: #include expects "FILENAME" or <FILENAME>
 #include
         ^
0_0_34569102_29461.cpp:8:9: error: #include expects "FILENAME" or <FILENAME>
 #include
         ^
0_0_34569102_29461.cpp: In function 'int main()':
0_0_34569102_29461.cpp:16:23: error: 'scanf' was not declared in this scope
  while (scanf("%d", &n) != EOF)
                       ^
0_0_34569102_29461.cpp:16:28: error: 'EOF' was not declared in this scope
  while (scanf("%d", &n) != EOF)
                            ^
0_0_34569102_29461.cpp:22:23: error: 'printf' was not declared in this scope
   printf("%d\n\n", sum);
                       ^