公元前和公元纪年转换成天干地支纪年

先确定一年是什么年在用循环做也行，用取余操作可以很好地避免循环

例如1911年是辛亥年。

此处用的是公式

# include <stdio.h>
# include <string.h>
# include <math.h>
char a[10][10] = {"Jia", "Yi", "Bing", "Ding", "Wu", "Ji", "Geng", "Xin", "Ren", "Gui"};
char b[12][10] = {"zi", "chou", "yin", "mao", "chen", "si", "wu", "wei", "shen", "you", "xu", "hai"};
int main()
{
    int i,n,year,x,y;
    while(scanf("%d",&n)!=EOF)
    {
        
        
        while(n--)
        {
            scanf("%d",&year);
            if(year>0)
            {
                x=(year-3+10)%10;
                if(x==0)
                    x=10;
                y=(year-3+12)%12;
                if(y==0)
                    y=12;
                printf("%s%s\n",a[x-1],b[y-1]);
            }
            else if(year < 0)
            {
                year=-year;
                int r=year%10;
                x=8-r;
                if(x<0)
                    x=10+x;
                if(x==0)
                    x=10;
                y=year%12;
                y=10-y;
                if(y<0)
                    y=y+12;
                else if(y==0)
                    y=12;
                printf("%s%s\n",a[x-1],b[y-1]);
            }
            else
            {
                printf("Gengshen\n");
            }
        }
    }
    return 0;
}