Lý thuyết Lập trình Hướng đối tượng - Võ Tấn Dũng (votandung) PhanSo

PHÂN SỐ namespace PhanSo { class PhanSo { int ts; //tu so int ms; // mau so public PhanSo() { this.ts = 0; this.ms = 1; }// public void Nhap1PS() { Console.Write("Nhap tu so:"); ts = int.Parse(Console.ReadLine()); do{ Console.Write("Nhap mau so (khac 0):"); ms = int.Parse(Console.ReadLine()); if(ms==0) Console.WriteLine("Phai nhap mau so khac 0!"); }while(ms==0); }// public int USCLN() { int a = Math.Abs(ts); int b = Math.Abs(ms); if (a == 0) return 1; while (a != b) { if (a > b) a = a - b; else b = b - a; } return a; }// public void RutGon1PS() { int uscln = USCLN(); ts = ts / uscln; ms = ms /uscln; if (ms * ts < 0) ts = -1 * Math.Abs(ts); else ts = Math.Abs(ts); ms = Math.Abs(ms); }// public void Xuat1PS() { RutGon1PS(); Console.WriteLine("[{0}/{1}]", ts, ms); }// public PhanSo Cong(PhanSo ps1) { this.RutGon1PS(); ps1.RutGon1PS(); PhanSo tam = new PhanSo(); tam.ts = this.ts * ps1.ms + this.ms * ps1.ts; tam.ms = this.ms * ps1.ms; tam.RutGon1PS(); return tam; }// public PhanSo Tru(PhanSo ps1) { this.RutGon1PS(); ps1.RutGon1PS(); PhanSo tam = new PhanSo(); tam.ts = this.ts * ps1.ms - this.ms * ps1.ts; tam.ms = this.ms * ps1.ms; tam.RutGon1PS(); return tam; }// public override string ToString() { RutGon1PS(); return "[" + ts + "/" + ms + "]"; } } } NGÀY THÁNG NĂM namespace NgayThang { class Date { int ngay; int thang; int nam; public Date() { = 0; thang = 0; nam = 0; }// public Date(int ng, int th, int nnam) { = ng; thang = th; nam = nnam; }// public bool KTNamNhuan(int year) { if (((year % == 0) && (year % 100 != 0)) || (year % 400 == 0)) return true; return false; }// public bool KTHopLe(int day, int month, int year) { int[] soNgayCuaThang = { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; if (KTNamNhuan(year) == true) soNgayCuaThang[2] = 29; if (day < || day > soNgayCuaThang[month]) return false; if (month < || month > 12) return false; if (year < 1) return false; return true; }// public void Nhap1Date() { int ngtam, thgtam, namtam; { Console.Write("Nhap ngay:"); ngtam = int.Parse(Console.ReadLine()); Console.Write("Nhap thang:"); thgtam = int.Parse(Console.ReadLine()); Console.Write("Nhap nam:"); namtam = int.Parse(Console.ReadLine()); if (KTHopLe(ngtam, thgtam, namtam) == false) Console.WriteLine("Ban nhap thang nam khong hop le.\nHay nhap lai!"); } while (KTHopLe(ngtam, thgtam, namtam) == false); this.ngay = ngtam; this.thang = thgtam; this.nam = namtam; } public override string ToString() { return "[" + + "/" + thang + "/" + nam + "]"; }// public double TongSoNgay() { int[] soNgayCuaThang = { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; if(KTNamNhuan(nam)==true) soNgayCuaThang[2]=29; long S=0; for (int i = 1; i < nam; i++) if (KTNamNhuan(i) == true) S = S + 366; else S = S + 365; for (int i = 0; i < thang; i++) S = S + soNgayCuaThang[i]; S = S + ngay; return S; }// public string ThuMay() { int tam = (int)(TongSoNgay() % 7); switch (tam) { case 0: return "Chu Nhat"; case 1: return "Thu Hai"; case 2: return "Thu Ba"; case 3: return "Thu Tu"; case 4: return "Thu Nam"; case 5: return "Thu Sau"; case 6: return "Thu Bay"; } return ""; }// public Date NgayTruocDo() { int day = ngay, month = thang, year = nam; int[] soNgayCuaThang = { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; if(KTNamNhuan(year)==true) soNgayCuaThang[2]=29; day = day - 1; if (day == 0) { month = month - 1; if (month == 0) { month = 12; year = year - 1; } day = soNgayCuaThang[month]; } Date t = new Date(day, month, year); return t; }// public Date NgayTiepTheo() { int day = ngay, month = thang, year = nam; int[] soNgayCuaThang = { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; if (KTNamNhuan(year) == true) soNgayCuaThang[2] = 29; day = day + 1; if (day > soNgayCuaThang[month]) { day = 1; month = month + 1; if (month > 12) { month = 1; year = year + 1; } } Date t = new Date(day, month, year); return t; } } } ... ps1.RutGon1PS(); PhanSo tam = new PhanSo( ); tam.ts = this.ts * ps1.ms + this.ms * ps1.ts; tam.ms = this.ms * ps1.ms; tam.RutGon1PS(); return tam; }// public PhanSo Tru (PhanSo. .. public PhanSo Tru (PhanSo ps1) { this.RutGon1PS(); ps1.RutGon1PS(); PhanSo tam = new PhanSo( ); tam.ts = this.ts * ps1.ms - this.ms * ps1.ts; tam.ms = this.ms * ps1.ms; tam.RutGon1PS(); return... if(KTNamNhuan(year)==true) soNgayCuaThang[2]=29; day = day - 1; if (day == 0) { month = month - 1; if (month == 0) { month = 12; year = year - 1; } day = soNgayCuaThang[month]; } Date t = new Date(day,