对字符串数组进行排序

#include<stdio.h>
#include<stdlib.h>
#include<string.h>

#define Nmax 1000
#define Mmax 10000

char buf[Mmax]; int M=0;

int compare(void *i, void *j);

int main(void)
{
	int N;
	char *a[Nmax];
	for(N=0; N<Nmax; N++)
	{
		a[N]=&buf[M];
		if(scanf("%s", a[N])==EOF) break;
		M+=strlen(a[N])+1;
	}
	qsort(a, N, sizeof(a[0]), compare);
	for(int i=0; i<N; i++) printf("%s
", a[i]);
	return 0;
}
int compare(void *i, void *j)
{
	return (strcmp(*(char **)i, *(char **)j));
}