View Compilation Error

0_0_38512706_7245.cpp: In function 'int main()':
0_0_38512706_7245.cpp:4:22: error: 'scanf' was not declared in this scope
  while(~scanf("%d",&n))
                      ^
0_0_38512706_7245.cpp:7:17: error: 'printf' was not declared in this scope
   printf("yes\n");
                 ^
0_0_38512706_7245.cpp:9:16: error: 'printf' was not declared in this scope
   printf("no\n");
                ^