Talk is easy, Show you code！
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#include<stdio.h>
void separate(int a)
{
int t = a, temp = 0;
// 定义临时变量t存放输入的原始值,temp为逆序后的值
while (t)
{
temp *= 10;
temp += t % 10;
t = t / 10;
}
// 当t不等于0时循环，依次取出各个位上的数字将其✖10后加到temp里
// 达到逆序效果
if (temp == a)
printf("%d是回文数\n",a);
// else
// printf("不是回文数\n");
// 如果逆序后的值等于逆序前的值那么它就是回文，否则不是
}
int GetDate(int MaxYear)
{
int year = 1000, month = 1, day = 1, date, MaxDay;
while (year <= MaxYear)
{
for (month = 1; month <= 12; month++)
{
date = year * 100 + month;
if (month == 2)
{
date = year * 100;
date += month;
if (((year % 4 == 0) && (year % 100 != 0)) || year % 400 == 0)
MaxDay = 29;
else
MaxDay = 28;
}
if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10
|| month == 12)
MaxDay = 31;
if (month == 3 || month == 4 || month == 6 || month == 9 || month == 11)
MaxDay = 30;
for (day = 1; day <= MaxDay; day++)
{
if (day < 10)
{
date *= 100;
date += day;
// printf("%d\n", date);
separate(date);
date /= 100;
}
else
{
date *= 100;
date += day;
// printf("%d\n", date);
separate(date);
date /= 100;
}
}
}
year++;
}
}
void main()
{
GetDate(2020);
printf("程序结束\n");
}
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