View Compilation Error

0_0_27230523_13337.cpp: In function 'int main()':
0_0_27230523_13337.cpp:8:18: error: 'scanf' was not declared in this scope
     scanf("%d",&T);
                  ^
0_0_27230523_13337.cpp:23:45: error: 'printf' was not declared in this scope
         printf("Case #%d: %I64d\n",iCase,res);
                                             ^