编程输入某人的生日日期,算出他的生日是星期几。(已知公元1年1月1...答:static int mdays[] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30 };int i, y = year - 1;for (i=0; i<month; ++i) days += mdays[i];if (month>2) { // Increment date if this is a leap year after February if (((year%400)==0) || ((year&3)...