Detail of message

Online Judge

Problem Set

Authors

Online Contests

User

Web Board
Home Page
F.A.Qs
Statistical Charts

Current Contest
Past Contests
Scheduled Contests
Award Contest

Re:请教一下二维数组qsort的cmp函数怎么写？

Posted by bluetiger at 2006-01-24 18:09:29
In Reply To:请教一下二维数组qsort的cmp函数怎么写？ Posted by:bluetiger at 2006-01-24 10:36:04

> 请教一下二维数组qsort的cmp函数怎么写？
> 例如
> 2 5
> 3 6
> 4 3
> 2 1
> 按第二列用qsort排序
> 谢谢！
我自己回答吧
   
int cmp(const void *a,const void *b)
{
    return *((int*)b+1)-*((int*)a+1);
}

Followed by:

ft... (112) isotope 2006-01-24 19:23:23

Post your reply here:

Home Page Go Back To top