身份证号码中出生年月的提取

#include<stdio.h>
int main()
{
int a,b,c,d;
char id[100][18];
int n;
int i;
for(i=0;i<n;i++)
{
scanf("%s",&id[i]);
}

scanf("%*6s%4d%2d%2d%*2s%1d",&a,&b,&c,&d);
printf("age=%d\n",2018-a);
if(b%2?"男":"女")
printf("yes\n");
else
printf("no\n");
printf("sex=%s\n",b%2?"男":"女");
printf("birth=%d-%d-%d\n",a,c,d);
return 0;
}