第十七周上机项目四（2）

/*
 *Copyright (c) 2014, 烟台大学计算机学院
 *All rights reserved.
 *文件名称：text.cpp
 *作者：陈栋梁
 *完成日期：2014年 12 月 27 日
 *版本号：v1.0
 *
 */
#include <iostream>
using namespace std;
int days(int,int,int);
int deffer(int,int,int,int);
struct Date
{
    int year;
    int month;
    int day;
};
int main()
{
    Date d1,d2;
    cout<<"输入第一个人的出生年、月、日:";
    cin>>d1.year>>d1.month>>d1.day;
     cout<<"输入第二个人的出生年、月、日:";
        cin>>d2.year>>d2.month>>d2.day;
    int days1,days2,defferdays;
    days1=days(d1.year,d1.month,d1.day);
    days2=days(d2.year,d2.month,d2.day);
    defferdays=deffer(d1.year,d2.year,days1,days2);
    cout<<"两人出生相差"<<defferdays<<"天。"<<endl;
    return 0;
}
int days(int y, int m, int d)
{
    int i,sumdays;
    for (i=1; i<=m; ++i)
    {
        switch (i)
        {
        case 1:
            sumdays=0;
            break;
        case 3:
        {
            if (((y%4 == 0 && y%100 != 0) || y%400 == 0))
                sumdays+=29;
            else sumdays+=28;
        }
        break;
        case 2:
        case 4:
        case 6:
        case 8:
        case 9:
        case 11:
            sumdays+=31;
            break;
        case 5:
        case 7:
        case 10:
        case 12:
            sumdays+=30;
            break;
        }
    }
    sumdays+=d;
    return(sumdays);
}
int deffer(int y1,int y2,int d1,int d2)
{
    int i,j,days=0;
    if(y1>y2)
    {
        i=y2;
        j=y1;
        days=d1-d2;
    }
    else
    {
        i=y1;
        j=y2;
        days=d2-d1;
    }
    for(; i<j; ++i)
    {
        days+=365;
        if (((i%4 == 0 && i%100 != 0) || i%400 == 0))
            days++;
    }
    return days;
}

运行结果：