Division

Question

when i count 9/2 is 4, the question is how to equal 4.5?

Answer 1

In terms of basic arithmetic...

9 divided by 2 is 4.5.
7 divided by 2 is 3.5.

By doing 9/2 in C++, the program treats both values as integer and hence returns an integer value of 4.

If you want to get 4.5, do 9.0/2.0.
If you want to get 3.5, do 7.0/2.0.

You may also look into float, double type variables, or read up on the usage of static_cast.