0910 输入一个年月日,判断是否闰年,输入几月几日,输出是今年的第几天

               

Console.Write("输入年:");                

int year = int.Parse(Console.ReadLine());

Console.Write("输入月:");                

int month = int.Parse(Console.ReadLine());                

Console.Write("输入日:");                

int day = int.Parse(Console.ReadLine());

               

bool isok = false;//用来记录日期是否正确                

bool isrun = false;

               

if (year >= 1759 && year < 9999)                

{                    

if (month >= 1 && month <= 12)//日期大于等于1天 并且 小于等于12天                    

{                        

if (month == 2)//日期是二月                        

{                            

if (year % 400 == 0 || (year % 4 == 0 && year % 100 != 0))//输入的年份整数400 或者 整除4并且不被100整除                            

{                                

if (day >= 1 && day <= 29)//日期大于等于1天 并且 小于等于29天                                

{                                    

isok = true;                                    

isrun = true;                                

}                                

else                                

{                                    

Console.WriteLine("应在29天范围之内"); //除此之外应该在29天范围以内                                

}                            

}                            

else                            

{                                

if (day >= 1 && day <= 28) //日期大于等于1天 并且 小于等于28天                                

{                                    

isok = true;                                

}                                

else                                

{                                    

Console.WriteLine("应在28天范围之内"); //除此之外应该在28天范围以内

                               

}                            

}                        

}                        

if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12)  //1 3 5 7 8 10 12月份                        

{                            

if (day >= 1 && day <= 31) //日期大于等于1天 并且 小于等于31天                            

{                                

isok = true;                            

}                            

else                            

{                                

Console.WriteLine("日期应在31天之内"); //除此之外应该在31天以内

                           

}                        

}

                       

if (month == 4 || month == 6 || month == 9 || month == 11)  //4 6 9 11月份                        

{                            

if (day >= 1 && day <= 30)//日期小于等于1天 并且 大于等于31天                            

{                                

isok = true;                            

}                            

else                            

{                                

Console.WriteLine("日期应在30天之内"); //除此之外应该在30天以内                            

}                        

}                    

}                    

else                    

{                        

Console.WriteLine("月份不正确");                    

}                

}                

else               

  {                    

Console.WriteLine("年份不正确");                

}

               

int sumday = 0;//第多少天                

if (isok)//日期正确,计算天数                

{                    

if (isrun)//是闰年                    

{                        

if (month == 1)                        

{                            

sumday = day;                        

}                        

if (month == 2)                        

{                            

sumday = 31 + day;                        

}                        

if (month == 3)                        

{                            

sumday = 31 + 29 + day;                        

}                        

if (month == 4)                        

{                            

sumday = 31 + 29 + 31 + day;

                       

}                         if (month == 5)                         {                             sumday = 31 + 29 + 31 + 30 + day;                         }                         if (month == 6)                         {                             sumday = 31 + 29 + 31 + 30 + 31 + day;                         }                         if (month == 7)                         {                             sumday = 31 + 29 + 31 + 30 + 31 + 30 + day;                         }                         if (month == 8)                         {                             sumday = 31 + 29 + 31 + 30 + 31 + 30 + 31 + day;                         }                         if (month == 9)                         {                             sumday = 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + day;                         }                         if (month == 10)                         {                             sumday = 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + day;                         }                         if (month == 11)                         {                             sumday = 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + day;                         }                         if (month == 12)                         {                             sumday = 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + day;                         }                     }                     else                                                                    //又或者不是闰年                     {                         if (month == 1)                         {                             sumday = day;                         }                         if (month == 2)                         {                             sumday = 31 + day;                         }                         if (month == 3)                         {                             sumday = 31 + 28 + day;                         }                         if (month == 4)                         {                             sumday = 31 + 28 + 31 + day;                         }                         if (month == 5)                         {                             sumday = 31 + 28 + 31 + 30 + day;                         }                         if (month == 6)                         {                             sumday = 31 + 28 + 31 + 30 + 31 + day;                         }                         if (month == 7)                         {                             sumday = 31 + 28 + 31 + 30 + 31 + 30 + day;                         }                         if (month == 8)                         {                             sumday = 31 + 28 + 31 + 30 + 31 + 30 + 31 + day;                         }                         if (month == 9)                         {                             sumday = 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + day;                         }                         if (month == 10)                         {                             sumday = 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + day;                         }                         if (month == 11)                         {                             sumday = 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + day;                         }                         if (month == 12)                         {                             sumday = 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + day;                         }                     }

                    Console.WriteLine("第{0}天", sumday);

                }                 else                 {                     Console.WriteLine("已经日期不正确,算不出来!");                 }                                 Console.ReadLine();

转载于:https://www.cnblogs.com/jlhea/p/4799914.html

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