#include<stdio.h>

int main()
{
    int d[6] , m[6] , y[6] ,a , b ,c ;
    for(int i=0;i<6;i++)
    {
        scanf("%d/%d/%d",&d[i],&m[i],&y[i]);
    }
    for(int j=0;j<6;j++)
    {
        for(int k=5;k>=j;k--)
        {
            if(y[k]<y[k-1])
            {
                a=y[k-1];
                y[k-1]=y[k];
                y[k]=a;
                b=m[k-1];
                m[k-1]=m[k];
                m[k]=b;
                c=d[k-1];
                d[k-1]=d[k];
                d[k]=c;
                continue;
            }
            else if(y[k]==y[k-1])
            {
                if(m[k]<m[k-1])
                {
                    a=y[k-1];
                    y[k-1]=y[k];
                    y[k]=a;
                    b=m[k-1];
                    m[k-1]=m[k];
                    m[k]=b;
                    c=d[k-1];
                    d[k-1]=d[k];
                    d[k]=c;
                    continue;
                }
                else if(m[k]==m[k-1])
                {
                    if(d[k]<d[k-1])
                        {
                            a=y[k-1];
                            y[k-1]=y[k];
                            y[k]=a;
                            b=m[k-1];
                            m[k-1]=m[k];
                            m[k]=b;
                            c=d[k-1];
                            d[k-1]=d[k];
                            d[k]=c;
                            continue;
                        }
                    else
                        continue;
                }
                else
                    continue;
            }
            else
                continue;
        }
    }
    for(int i=0;i<6;i++)
    {
        printf("%02d/%02d/%02d\n",d[i],m[i],y[i]);
    }
    return 0;
}  这个我朋友写的代码 但是我想变得简单点 求大神指教！！！！！！！！！

#include<stdio.h>

int main()
{
    int d[6] , m[6] , y[6] ,a , b ,c ;
    for(int i=0;i<6;i++)
    {
        scanf("%d/%d/%d",&d[i],&m[i],&y[i]);
    }
    for(int j=0;j<6;j++)
    {
        for(int k=5;k>=j;k--)
        {
            if((y[k]*100+m[k])*100+d[k]<(y[k-1]*100+m[k-1])*100+d[k-1])
            {
                a=y[k-1];
                y[k-1]=y[k];
                y[k]=a;
                b=m[k-1];
                m[k-1]=m[k];
                m[k]=b;
                c=d[k-1];
                d[k-1]=d[k];
                d[k]=c;
            }
        }
    }
    for(int i=0;i<6;i++)
    {
        printf("%02d/%02d/%02d\n",d[i],m[i],y[i]);
    }
    return 0;
}

if((y[k]*100+m[k])*100+d[k]<(y[k-1]*100+m[k-1])*100+d[k-1]) 这个是什么意思 可以 解释一下吗 ？

声明一个int数组dayvalue
scanf时，把对应的日期数据 年x10000+月x100+日
然后对int数组dayvalue排序，再输出。

为什么不直接用标准函数 qsort

毕竟还没学