private void btnTinh_Click(object sender, EventArgs e)
{
if (txtA.Text != "" && txtB.Text != "")
{
SoNguyenLon a = new SoNguyenLon(txtA.Text, 1);
SoNguyenLon b = new SoNguyenLon(txtB.Text, 1);
txtKetQua.Text = SoNguyenLon.nhanSoNguyenLon(a, b).xuat();
}
}
public static SoNguyenLon congHaiSoNguyenLon(SoNguyenLon A, SoNguyenLon B)
{
int nho = 0;
int n = A.soNguyen.Length - B.soNguyen.Length;//n > 0 , n < 0 , n = o
if (n == 0)
{
}
if (n > 0)
{
for (int i = 0; i < n; i++)
{
B.soNguyen = "0" + B.soNguyen;
}
}
else
{
for (int i = 0; i < Math.Abs(n); i++)
{
A.soNguyen = "0" + A.soNguyen;
}
}
String a = A.soNguyen, b = B.soNguyen, kq = "";
//System.out.println(a + " cộng " + b);
int x, y;
for (int i = a.Length - 1; i >= 0; i--)
{
x = int.Parse(a[i] + "");
y = int.Parse(b[i] + "");
int tong = x + y + nho;
if (tong >= 10)
{
kq = (tong + "")[1] + kq;
nho = int.Parse((tong + "")[0] + "");
}
else
{
kq = tong + kq;
nho = 0;
}
//System.out.println(i + " : " + x + " cong " + y + " bang " + tong +" nho " + nho);
}
if (nho == 1)
{
kq = nho + kq;
}
SoNguyenLon dapAn = new SoNguyenLon(kq, 1);
//System.out.println(A.soNguyen + " + " + B.soNguyen + " = " + dapAn.soNguyen);
//System.out.println("Ket thuc ");
return(dapAn);
}
public static String TongHopKQ(SoNguyenLon m1, SoNguyenLon m2, SoNguyenLon m3, int n)
{
String kq = "";
//System.out.println("Bat dau tong hop kq qua cuoi cung ");
//m1.xuat();
//m2.xuat();
//m3.xuat();
for (int i = 0; i < n; i++)
{
m1.soNguyen += "0";
}
for (int i = 0; i < n / 2; i++)
{
m2.soNguyen += "0";
}
//System.out.println("Sau khi tong hop ket qua : " + m1.soNguyen + " " + m2.soNguyen + " " + m3.soNguyen);
SoNguyenLon m1_m2 = SoNguyenLon.congHaiSoNguyenLon(m1, m2);
SoNguyenLon dapAn = SoNguyenLon.congHaiSoNguyenLon(m1_m2, m3);
kq = dapAn.soNguyen;
return(kq);
}
public static SoNguyenLon nhanSoNguyenLon(SoNguyenLon a, SoNguyenLon b)
{
//System.out.println("Bat dau nhan hai so nguyen lon : " + a.soNguyen + " và " + b.soNguyen);
SoNguyenLon kq;
int n;
if (a.n < b.n)
{
n = b.n - a.n;
for (int i = 0; i < n; i++)
{
a.soNguyen = "0" + a.soNguyen;
}
}
else if (a.n > b.n)
{
n = a.n - b.n;
for (int i = 0; i < n; i++)
{
b.soNguyen = "0" + b.soNguyen;
}
}
else
{
n = a.n;//số lượng chữ số
}
if (n == 1)
{
int tich = int.Parse(a.soNguyen) * int.Parse(b.soNguyen);
int dau = a.dau * b.dau;
kq = new SoNguyenLon(tich + "", dau);
return(kq);
}
else
{
SoNguyenLon A = new SoNguyenLon(a.tachSoLeft(), 1); //5
//A.xuat();
SoNguyenLon B = new SoNguyenLon(a.tachSoRight(), 1); //5
//B.xuat();
SoNguyenLon C = new SoNguyenLon(b.tachSoLeft(), 1); //5
//C.xuat();
SoNguyenLon D = new SoNguyenLon(b.tachSoRight(), 1); //5
//D.xuat();
SoNguyenLon m1 = SoNguyenLon.nhanSoNguyenLon(A, C);
//System.out.println(A.soNguyen + " nhan " + C.soNguyen);
//m1.xuat();//25
SoNguyenLon m2_A = SoNguyenLon.nhanSoNguyenLon(A, D);
//System.out.println(A.soNguyen + " nhan " + D.soNguyen);
//m2_A.xuat();
SoNguyenLon m2_B = SoNguyenLon.nhanSoNguyenLon(B, C);
//System.out.println(B.soNguyen + " nhan " + C.soNguyen);
//m2_B.xuat();
SoNguyenLon m2 = SoNguyenLon.congHaiSoNguyenLon(m2_A, m2_B);
//System.out.println(m2_A.soNguyen + " cong " + m2_B.soNguyen);
//m2.xuat();//0
SoNguyenLon m3 = SoNguyenLon.nhanSoNguyenLon(B, D);
//System.out.println(B.soNguyen + " nhan " + D.soNguyen);
//m3.xuat();//25
int dau = a.dau * b.dau;
String tonghop = SoNguyenLon.TongHopKQ(m1, m2, m3, n);
kq = new SoNguyenLon(tonghop, dau);
}
return(kq);
}