Need Help with a bolt circle program

[Didlldo]

Hi, I am new to these forums and fairly new to c++ Pragrammning but I have written a couple of programs. I am just having trouble figuring out where to even start with this program though. I have done all me cout and cin for all the input I need I just need to figure out how to do the calculations properly. The Program is supposed to calculate the X and Y co-ordinates for each hole in a bolt circle. So you input where the center of the circle is located on an X,Y co-ordinate graph, then you enter the diameter of the circle and the number of holes around the circle. So The problem I'm having is trying to figure out how to allow the program to do an amount of calculations depending on the amount of holes. Would you use some kind of loop, I've never done a loop before so I'm not sure how to do that. Let me know if you would be able to help me. Thanks

[helios]

http://www.cplusplus.com/doc/tutorial/control/