Projectile Motion Calculator

Hi. I made this code just for a math game called Project TRIG. ( http://www.mathplayground.com/ProjectTRIG/ProjectTRIGPreloader.html ) I used to calculate the solutions of the game manually, but to make it easier, I made a code which automatically calculates for it. The computer will save us from advanced math concepts. This is basically helpful for beginners to understand some c++ concepts like iteration structures, the use of sstream, and jump statements, and also on how to perform complex mathematical operations by the use of simple algorithm. Just a few guide for the needed values: At the game, you can activate the grid button to calculate the distance. angle = decide what value of angle you want to use. yo = the height of the cannon. x coordinate = the distance of target horizontally. y coordinate = the distance of target vertically. The code is very suitable to anyone who is just beginning programming.