输入一个年输出其天干地支纪年法的表达式

#include <iostream>
#include <cmath>
using namespace std;

char *day_name1(int x)
{
	static char *name[20]={"Gui","Jia", "Yi", "Bing", "Ding", "Wu", "Ji", "Geng", "Xin", "Ren", "Gui"};
	return (name[x]);
}
char *day_name2(int y)
{
	static char *name[20]={"Hai","Zi", "Chou", "Yin", "Mao", "Chen", "Si", "Wu", "Wei", "Shen", "You", "Xu", "Hai"};
	return (name[y]);
}
int main()
{
	int m;
	cin>>m;
	while(m--)
    {
        int year,t,d;
		char *day_name1(int x);
		char *day_name2(int y);
        cin>>year;
        t=(year-3)%10;
        d=(year-3)%12;
		cout<<day_name1(t)<<day_name2(d)<<endl;
	}
    return 0;
}