View Compilation Error

0_0_34444753_26368.cpp: In function 'int main()':
0_0_34444753_26368.cpp:4:15: error: 'scanf' was not declared in this scope
  scanf("%d",&m);
               ^
0_0_34444753_26368.cpp:15:23: error: 'printf' was not declared in this scope
   printf("%.2lf\n",sum);
                       ^