Where is the error in C++Builder?

Question

C++ / C#

Expression S=4+7-10+13+16-19+22+25-28+...total n terms;
Correct code?

Answer 1

There is no error in C++Builder. The program does exactly what you wrote in it.
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Answer 2

Try to figure out in your head how many times your loop will be executed if you take n=2.