Help me in String and Number

I prefer c++ mostly nowadays

bhai from where you learn c++ as i am new c++ previously i do java

which coding sited you follow

Aare, just try to implement the same program in c++(at least you would know those includes and main() _ wherever you stuck, google it how to do…that’s it

I also started with Java, btw

but I don’t know about STL library

Just start coding and keep learning, You will automatically get that…
Practicals are the best way to learn ( acc. to me )
And also, If you are good at a language like Java (OOPS, data structures and all), then it becomes so easy to learn a language