1 piece of digital images, marked with x2, x3, x4, x5 four number, screen scrolling effect, can increase deceleration, namely the acceleration - uniform - reduction, the target is to specify the stop position (i.e. the screen center on behalf of the target location), for example, in "x4", then "x4" in the middle,
Could you tell me how to implement a c + +, to ask you,
