View Compilation Error

0_0_17516840_15621.cpp:1:10: error: #include expects "FILENAME" or <FILENAME>
 #include 
          ^
0_0_17516840_15621.cpp: In function 'int main()':
0_0_17516840_15621.cpp:5:30: error: 'scanf' was not declared in this scope
    while(scanf("%d%d", &i, &j) == 2) 
                              ^
0_0_17516840_15621.cpp:6:24: error: 'printf' was not declared in this scope
    printf("%d\n", i + j); 
                        ^