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Hello, BP.

Is possible to print but not change lines, but the next printing continue after the last character? similar to suppress the << endl; in c++

cout << "abc";
cout << "abc" << endl;

No, but I will fix printf and you will be able to have pretty-print output.

The scanf reverse function of printf, is also very necessary, to capture data within the execution of an algorithm, without calling the dialog boxes (input, inputstr, inputform)

I won't do any new interactive input command, because I don't think it is the right way to input data in a CAS. The right way is write non interactive functions, all the interaction with the user should be in the CAS commandline UI (or in read commands).