View Compilation Error

0_0_34810542_4218.cpp:1:9: error: #include expects "FILENAME" or <FILENAME>
 #include
         ^
0_0_34810542_4218.cpp: In function 'int main()':
0_0_34810542_4218.cpp:5:29: error: 'scanf' was not declared in this scope
 while (scanf("%d %d", &a, &b) != EOF)
                             ^
0_0_34810542_4218.cpp:5:34: error: 'EOF' was not declared in this scope
 while (scanf("%d %d", &a, &b) != EOF)
                                  ^
0_0_34810542_4218.cpp:6:21: error: 'printf' was not declared in this scope
 printf("%d\n", a + b);
                     ^