身份证号码中出生年月的提取

#include 
#include 
#define N 18
int main()
{
    int i,n,sum;
    int a[N];
    for(i=0;i"%1d",&a[i]);

    }
    for(i=0;iif(a[16]%2==0)
        {
            printf("是女生\n");break;
        }
        else if(a[16]%2!=0)
        {
            printf("是男生\n");break;
        }
    }
    sum=(2018-(a[6]*1000+a[7]*100+a[8]*10+a[9]));
    printf("%d\n",sum);