I am a class 9th student and i am a starter

Question

please tell me where I can write this programs

Answer 1

You can use every texteditor, however, I recommend using some IDE, which is enviroment for programming. From my experience, I can recommend products from JetBrains, concretely CLion for C++. Nevertheless, maybe you could learn some another language before C++, as it's one of most difficult to learn. :)

Answer 2

the beginning of the C++ tutorial points you to the CodeBlocks IDE. I'd follow the advice