Code:

iTotal=0; */*clear iTotal*/*
iISBN[i]=cISBN[i]-48; */*turn ASCII numbers to base 10 for doing the arithmetic part next*/*
iTotal+=iISBN[i]*(i+1); */*times the element by 'it's position + 1', since ISBN weighting values are 1,2,3,4,5,6,7,8,9 and initial i is 0, and add it to iTotal*/*
iCheck=0; */*clear iCheck*/*
iCheck=iTotal%11; */*iCheck becomes the remainder of iTotal divided by 11, ISBN uses mod 11*/*
cout<<(iCheck); */*output iCheck, the remainder aka the ISBN check digit, and I used cout because printf gave me errors*/*

So, what is wrong in my calculations