C # Big Data calculator-Multiplication

Class bigmultiply: bigcalculate
 

{

Public override string evaluate (string num1, string num2)

{

If (num1.equals ("0") | num2.equals ("0 "))

{

Return "0 ";

}

List liallnum = new list (); // stores the result of each multiplication of the multiplier.

List Lich = new list (); // stores the result of each digit of the multiplier multiplication.

// Assign a long number to num1 for later Computation

If (num1.length <num2.length)

{

Changenum (ref num1, ref num2 );

}


Int flag;

For (INT I = num2.length-1; I> = 0; I --)

{

// Initialize the data in the previous multiplication.

Lich. Clear ();

Flag = 0;

// Calculate the I-th digit multiplied by the J-th Digit

For (Int J = num1.length-1; j> = 0; j --)

{

Lich. Add (char) (num2 [I]-'0') * (num1 [J]-'0') + flag + '0 '));

Flag = (Lich [lich. Count-1]-'0')/10;

Lich [lich. Count-1] = (char) (Lich [lich. Count-1]-'0') %
10 + '0 ');

}

// If the carry value is not 0, add a bit

If (flag> 0)

{

Lich. Add (char) (flag + '0 '));

}

// Add a result set

Liallnum. Add (invertorder (new string (lich. toarray () + new
String ('0', liallnum. Count ));

}

Int COUNT = 0;

String res = "0 ";

// Call the add method to add the result of each multiplication, that is, the result

Bigadd addoper = new bigadd ();

While (count

{

Res = addoper. Loads (Res, liallnum [count]);

Count ++;

}

Return res;

}
}