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请问,qsort的一些用法,long int和int怎么不一样

Posted by hanajiang at 2006-08-01 11:53:47 on Problem 2388
如果用long int,就编译通不过,总是说cmp不对,如果把下面的所有的long int改为int就ac了,不明白为什么,明白的指点一下吧
#include <iostream.h>
#include <stdlib.h>

lont int cmp(const void *a,const void *b)
{
		return *(lont int *)a - *(long int *)b;
}
void main()
{
	int N;
	cin>>N;
  long int *a=new  int [N];
	for(int i=0;i<N;i++)
		cin>>a[i];

	qsort(a,N,sizeof(a[0]),cmp);
	cout<<a[N/2]<<endl;
}

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