程序代码：

// ConsoleApplication2.cpp : 定义控制台应用程序的入口点。
//

#include <stdio.h> 
#include<stdlib.h>
#include<string.h>
#include<time.h>
int main()
{
    char id[] = "";
    printf("enter your id:");
    scanf("%s", &id);
    printf("you born on %c%c%c%cyear%c%cmonth%c%cday\n", id[6], id[7], id[8], id[9], id[10], id[11], id[12], id[13]);
    long nowyear, days, i,T;
    char a[12] = { 31,29,31,30,31,30,31,30,31,31,31,30 };
    printf("now is：");
    T = id[10] * 10 + id[11];
    days = id[12] * 10 + id[13];
    scanf("%d", &nowyear);

    if (nowyear % 4 == 0 && nowyear % 100 != 0)
        {
        char a[12] = { 31,29,31,30,31,30,31,30,31,31,31,30 };
    }
    else
    {
            char a[12] = { 31,28,31,30,31,30,31,30,31,31,31,30 };
        }
    for (i = 0; i < (id[10] * 10 + id[11] -1); i++)
        days += a[i];
    printf("your birthday is the %l days.\n", days);

    system("pause");
    return 0;
}

    char id[] = "";
    printf("enter your id:");
    scanf("%s", &id);
    printf("you born on %c%c%c%cyear%c%cmonth%c%cday\n", id[6], id[7], id[8], id[9], id[10], id[11], id[12], id[13]);