按年龄排序通讯录（注意排序算法中的变量及年龄计算方法）

#include <stdio.h>
int main()
{
	struct book
	{
		char name[11];
		char birthday[10];
		char telephone[18];
		int time;
	};
	int N;
	struct book a[10];
	scanf("%d", &N);
	int i, j;
	int index;
	for(i = 0; i < N; i++)
	  {
	  	scanf("%s %s %s", a[i].name, a[i].birthday, a[i].telephone);
	  	int time1=(a[i].birthday[0]-'0')*1000+(a[i].birthday[1]-'0')*100+(a[i].birthday[2]-'0')*10+(a[i].birthday[3]-'0')*1;
        int time2=(a[i].birthday[4]-'0')*10+(a[i].birthday[5]-'0')*1;
        int time3=(a[i].birthday[6]-'0')*10+(a[i].birthday[7]-'0')*1;
        a[i].time =  (9999-time1)*365+(12-time2)*30+(30-time3)*1;
	  }
	struct book temp;
	for(i = 0; i < N - 1; i++)
	   {
	   	   index = i;
	   	   temp = a[i];
	   	   for(j = i + 1; j < N; j++)
	   	       {
	   	       	 if(a[j].time >= a[index].time)  index = j;
				}
			a[i] = a[index];
			a[index] = temp;
	   }
	for(i = 0; i < N; i++)
	{printf("%s %s %s\n", a[i].name, a[i].birthday, a[i].telephone);}
    return 0;
}