4.28.FOR Loops and Exercises

if (m = = 1 | | m = = 3 | | m = = 5 | | m = = 7 | | m = = 8 | | m = = | | m = = 12)

{

if (d <= && d > 0)//date entered correctly

{

Console.WriteLine ("Date entered correctly!") ");

Console.WriteLine (Y + "year" + M + "month" + D + "Day");

}

Else

{

Console.WriteLine ("Date entered incorrectly!") ");

}

}

else if (m = = 4 | | m = = 6 | | m = 9 | | m = = 11)//input is Xiao Yue

{

if (d <= && d > 0)//date entered correctly

{

Console.WriteLine ("Date entered correctly!") ");

Console.WriteLine (Y + "year" + M + "month" + D + "Day");

}

Else

{

Console.WriteLine ("Date entered incorrectly!") ");

}

}

else if (m = = 2)//If it is February

{

Determine if a leap year

The year can be divisible by 4 and not divisible by 100

Special year: Or, the year can be divisible by 400

if (y% 4 = = 0 && y% = 0) | | y% 400 = 0)//description is currently a leap year

{

if (d <= && d > 0)//date correct

{

Console.WriteLine ("Date entered correctly!") ");

Console.WriteLine (Y + "year" + M + "month" + D + "Day");

Console.WriteLine (y + "years is a leap year!) ");

}

else//Date Error

{

Console.WriteLine ("Date entered incorrectly!") ");

}

}

else//description is not a leap year

{

if (d <= && d > 0)//date correct

{

Console.WriteLine ("Date entered correctly!") ");

Console.WriteLine (Y + "year" + M + "month" + D + "Day");

Console.WriteLine (y + "years is not a leap year!) ");

}

else//Date Error

{

Console.WriteLine ("Date entered incorrectly!") ");

}

}

}

}

Else//Month Error

{

Console.WriteLine ("Incorrect month input!) ");

}

}

else//Year input error

{

Console.WriteLine ("The year entered incorrectly!") ");

}

Console.ReadLine ();

}

}

}

4.28.FOR Loops and Exercises