C语言,遍历万年历

遍历万年历"/>

C语言,遍历万年历

目录

int getWeekdayByYearday(int iY, int iM, int iD)

功能：判断某天是周几

参数：年、月、日

返回值：0~6   周日-周6

int MyYear(int year, int month)

功能：判断某年某月有几天（需判断闰年，平年）

参数：年、月

返回值：天数 28 29 30 31

int MyOutPut(int year, int month)

功能：打印某年某月的万年历

参数：年、月

返回值：-1 传参错误，0打印成功

主函数main

int getWeekdayByYearday(int iY, int iM, int iD)

功能：判断某天是周几

参数：年、月、日

返回值：0~6   周日-周6

int getWeekdayByYearday(int iY, int iM, int iD)
{int iWeekDay = -1;if (1 == iM || 2 == iM) {iM += 12;iY--;}iWeekDay = (iD + 1 + 2 * iM + 3 * (iM + 1) / 5 + iY + iY / 4 - iY / 100 + iY / 400) % 7;return iWeekDay;
}

int MyYear(int year, int month)

功能：判断某年某月有几天（需判断闰年，平年）

参数：年、月

返回值：天数 28 29 30 31

int MyYear(int year, int month)
{int day = 0;switch (month) {case 1:case 3:case 5:case 7:case 8:case 10:case 12:day = 31;break;case 4:case 6:case 9:case 11:day = 30;break;case 2:if ((0 == year % 4 && 0 != year % 400) || 0 == year % 400) {day = 29;} else {day = 28;}break;}return day;
}

int MyOutPut(int year, int month)

功能：打印某年某月的万年历

参数：年、月

返回值：-1 传参错误，0打印成功

int MyOutPut(int year, int month)
{int day = 0;int week = 0;if (year <= 0 && (month <= 0) || month > 13) {printf("参数传递错误，请重新输入：");return -1;}day = MyYear(year, month);printf("[%d  %d]:\n", year, month);printf("Sun\tMon\tTue\tWed\tThu\tFri\tSat\n");for (int i = 1; i <= day; i++) {week = getWeekdayByYearday(year, month, i);if (1 == i) {switch (week) {case 0:printf("%-2d\t", i);break;case 1:printf("\t%-2d\t", i);break;case 2:printf("\t\t%-2d\t", i);break;case 3:printf("\t\t\t%-2d\t", i);break;case 4:printf("\t\t\t\t%-2d\t", i);break;case 5:printf("\t\t\t\t\t%-2d\t", i);break;case 6:printf("\t\t\t\t\t\t%-2d\n", i);break;}} else {switch (week) {case 0:case 1:case 2:case 3:case 4:case 5:printf("%-2d\t", i);break;case 6:printf("%-2d\n", i);break;}}}printf("\n\n");return 0;
}

主函数main

int main(int argc, char const* argv[])
{printf("********************************\n");printf("*****按year输出万年历*************\n");printf("*****按month输出万年历************\n");printf("********************************\n");printf("point '1.year' or '2.month':");int choose = 0;int year = 0;int month = 0;int day = 0;
rester1:scanf("%d", &choose);if (1 != choose && 2 != choose) {printf("输出错误！请重新输出 1 or 2:");goto rester1;}if (1 == choose) {rester2:printf("请输出具体的年份，如2019：");scanf("%d", &year);if (year <= 0) {printf("输出错误！请重新输入年份year>0：");goto rester2;}for (int i = 1; i <= 12; i++) {day = MyOutPut(year, i);}}if (2 == choose) {printf("请输出具体的年份,月份，如2019 10：");scanf("%d%d", &year, &month);if (year <= 0) {printf("输出错误！请重新输入年份year>0,month>0且month<13：");goto rester2;}day = MyOutPut(year, month);}return 0;
}