View Compilation Error

0_0_33936137_13538.cpp: In function 'int main()':
0_0_33936137_13538.cpp:3:23: error: 'scanf' was not declared in this scope
     scanf("%d%d",&A,&B);
                       ^
0_0_33936137_13538.cpp:5:20: error: 'printf' was not declared in this scope
     printf("%d",sum);
                    ^