#include <stdlib.h>
int cmp(const void* a,const void* b)
{int *s1;
int *s2;
s1 = (int *)a;
s2 = (int *)b;
return *s1 - *s2;
}
qsort(a,m,sizeof(int),cmp);
#include <algorithm>
bool cmp(int a,int b)
{
return a<b;
}
sort(a,a+m,cmp) 等价与 sort(a,a+m)