View Compilation Error

0_0_24675803_16639.cpp: In function 'int main()':
0_0_24675803_16639.cpp:25:17: error: 'scanf' was not declared in this scope
  scanf("%d",&num);
                 ^
0_0_24675803_16639.cpp:40:22: error: 'printf' was not declared in this scope
   printf("%d\n",count);
                      ^