+ 1
https://www.tutorialspoint.com/what-is-the-difference-between-printf-and-cout-in-cplusplus
https://www.quora.com/What-is-the-difference-between-printf-cout-in-C++
https://www.sololearn.com/Discuss/1472594/whats-the-difference-between-printf-and-cout
https://www.sololearn.com/Discuss/1530366/what-s-the-different-between-printf-and-cout