View Compilation Error

0_0_19735419_18807.cpp: In function 'int main()':
0_0_19735419_18807.cpp:9:15: error: 'scanf' was not declared in this scope
  scanf("%d",&N);
               ^
0_0_19735419_18807.cpp:20:36: error: 'printf' was not declared in this scope
    printf("Case %d: %d\n",x++,count);
                                    ^
0_0_19735419_18807.cpp:23:15: error: 'printf' was not declared in this scope
    printf("\n");
               ^