蔡勒公式(计算星期几)
int zeller(int y,int m,int d){
//((year%4==0&&year%100!=0)||year%400==0)
if (m<=2) y--,m+=12;
int c=y/100; y%=100;
int w=((c>>2)-(c<<1)+y+(y>>2)+(13*(m+1)/5)+d-1)%7;
if (w<0) w+=7; return(w);
}int zeller(int y,int m,int d){
//((year%4==0&&year%100!=0)||year%400==0)
if (m<=2) y--,m+=12;
int c=y/100; y%=100;
int w=((c>>2)-(c<<1)+y+(y>>2)+(13*(m+1)/5)+d-1)%7;
if (w<0) w+=7; return(w);
}相关推荐