View Compilation Error

0_0_34924058_19783.cpp: In function 'int main()':
0_0_34924058_19783.cpp:4:29: error: 'printf' was not declared in this scope
  printf("需计算整数对数目：");
                             ^
0_0_34924058_19783.cpp:5:15: error: 'scanf' was not declared in this scope
  scanf("%d",&N);
               ^