Msdn logic error found: clistbox: deletestring

Msdn clistbox: deletestring mistake

Link:

Http://msdn.microsoft.com/zh-cn/library/466e49kb (V = vs.80). aspx

Its example is:

// The pointer to my list box. </P> <p> extern clistbox * pmylistbox; </P> <p> // delete every other item from the list box. </P> <p> for (INT I = 0; I <pmylistbox-> getcount (); I ++) </P> <p >{</P> <p> pmylistbox-> deletestring (I); </P> <p>}

 

Place pmylistbox-> getcount () in the cyclic control condition. Each time you delete a string, pmylistbox-> getcount (), one is subtracted, and the cyclic control variable increases by one.

We can imagine that the number of times this for loop is executed must not be pmylistbox-> getcount () before the loop is executed, but pmylistbox-> getcount ()/2.

Specifically, it is:

 

Pmylistbox-> getcount (): n → N-1 → N-2 → ...... → N/2 →

I: 1 → 2 → ...... → N/2-1 → n/2 →

So far, the loop ends.