View Compilation Error

0_0_34709574_9272.cpp:2:9: error: #include expects "FILENAME" or <FILENAME>
 #include
         ^
0_0_34709574_9272.cpp:8:9: error: #include expects "FILENAME" or <FILENAME>
 #include
         ^
0_0_34709574_9272.cpp: In function 'int main()':
0_0_34709574_9272.cpp:24:23: error: 'scanf' was not declared in this scope
  while (scanf("%d", &n) != EOF)
                       ^
0_0_34709574_9272.cpp:24:28: error: 'EOF' was not declared in this scope
  while (scanf("%d", &n) != EOF)
                            ^
0_0_34709574_9272.cpp:40:21: error: 'printf' was not declared in this scope
   printf("%d\n", sum);
                     ^