using a cirular index

[jimberger]

Hello,

i am trying to implement an circle using an index. I have an index of 0 to 7. i want to increase the index 3 places at a time but when it gets to 7 and want it to wrap round to 0 and so on. for example if the index is on 6 then after increment then the index will be on 1. any ideas on how i can do this?
thanks for your help

 

[KeavDog]

Use the modulus operator to reset the index to 0 once it gets to 8. This should cycle your index from 0 to 7.

index = ( ( index++ ) % 8 ) ;

 

[xwb]

Someone else also asked this in another forum

index = (index + 3) % 8;