View Compilation Error

0_0_13110996_9074.cpp: In function 'int main()':
0_0_13110996_9074.cpp:25:21: error: 'scanf' was not declared in this scope
      scanf("%d",&num);
                     ^
0_0_13110996_9074.cpp:40:33: error: 'printf' was not declared in this scope
              printf("%d\n",count);
                                 ^
0_0_13110996_9074.cpp:42:17: error: expected '}' at end of input
         return 0;
                 ^