08/01/19 00:13:14
>>231
#include<stdio.h>
int weekday(int y,int m,int d){
if(m<3)y--,m+=12;
return (y+y/4-y/100+y/400+(m*13+8)/5+d)%7;
}
int main(void){
int y,m,d;
printf("年 = ");scanf("%d",&y);
printf("月 = ");scanf("%d",&m);
printf("日 = ");scanf("%d",&d);
printf("日 月 火 水 木 金 土\n%*s↑\n",weekday(y,m,d)*3,"");
return 0 ;
}