cin cout and scanf printf

Question

im coding on a web these days and i found that sometime the test machine returned false when i used cin cout but correct when it's changed to printf and scanf.

Answer 1

Share your code or save it in Code Playground so people can see it, until then it's hard to say ...

Answer 2

Printf, Scanf is C.
Cout, Cin is C++.

Answer 3

while both methods can be used in c++, the i/o streams are easier to work with imo