This is an old calculator program I wrote in C# :
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using System; using System.Threading; namespace Rechner { class MainClass { public static double vari1=1,vari2=1; public static void Main (string[] args) { do{ Einführung(); string einlese = Convert.ToString(Console.ReadLine()); Double ergebniss=0; switch(einlese) { case "+" : ergebniss = plus();break; case "-" : ergebniss = minus();break; case "*" : ergebniss = Mal();break; case "/" : ergebniss = Div();break; case "var1" : var1();break; case "var2" : var2();break; } Console.WriteLine("Die Lösung ist nach Adam Rieße "+ergebniss); Console.WriteLine(""); Console.WriteLine ("Enter zum fortsetzen,var1 oder var2 zum speichern in Variablen !"); try{ string speichern = Console.ReadLine(); if(speichern == "var1") {vari1 = ergebniss;Console.WriteLine("Variable 1 ist "+ergebniss);Console.ReadLine();} if(speichern == "var2") {vari2 = ergebniss;Console.WriteLine("Variable 2 ist "+ergebniss);Console.ReadLine();} }catch{} }while(true); } static Double plus() { Double summe=0; do{ Console.Clear(); Console.WriteLine("= zum beenden eingeben !"); Console.WriteLine("Ergebnis = "+summe); Console.WriteLine (""); Console.WriteLine ("Variable 1 :"+vari1); Console.WriteLine ("Variable 2 :"+vari2); Console.Write("Zahl (+):"); string a = Console.ReadLine(); if (a == "=") { break; } if (a == "var1") { summe = summe + vari1; } if (a == "var2") { summe = summe + vari2; } else { try { summe = summe + Convert.ToDouble(a); } catch { } } }while(true); return (summe); } static Double minus() { Double summe=0; do{Console.Clear(); Console.WriteLine("= zum beenden eingeben !"); Console.WriteLine("Ergebnis = "+summe); Console.WriteLine (""); Console.WriteLine ("Variable 1 :"+vari1); Console.WriteLine ("Variable 2 :"+vari2); Console.Write("Zahl (-):"); string a = Console.ReadLine(); if (a == "=") { break; } if (a == "var1") { summe = summe - vari1; } if (a == "var2") { summe = summe - vari2; } else { try { summe = summe - Convert.ToDouble(a); } catch { } } }while(true); return(summe); } static void var1() { Console.Clear(); Console.Write ("Variable 1 ändern:"); try{ string einlese = Convert.ToString(Console.ReadLine()); vari1 = Convert.ToDouble(einlese); Console.WriteLine ("Variable 1 geändert:"+vari1); if(vari2 == 0){vari2 = 1;Console.WriteLine ("0 nicht erlaubt !");Console.ReadLine();} if(vari1 == 0){vari1 = 1;Console.WriteLine ("0 nicht erlaubt !");Console.ReadLine();} }catch{Console.WriteLine ("ERROR !");} } static void var2() { Console.Clear(); Console.Write ("Variable 2 ändern:"); try{ string einlese = Convert.ToString(Console.ReadLine()); vari2 = Convert.ToDouble( einlese); Console.WriteLine ("Variable 2 geändert:"+vari2); if(vari2 == 0){vari2 = 1;Console.WriteLine ("0 nicht erlaubt !");Console.ReadLine();} if(vari1 == 0){vari1 = 1;Console.WriteLine ("0 nicht erlaubt !");Console.ReadLine();} }catch{Console.WriteLine ("ERROR !");} } static Double Mal() {Double summe = 0; try{ Console.Write("Zahl :"); summe=Convert.ToDouble(Console.ReadLine()); }catch{} do{ Console.Clear(); Console.WriteLine("= zum beenden eingeben !"); Console.WriteLine("Ergebnis = "+summe); Console.WriteLine (""); Console.WriteLine ("Variable 1 :"+vari1); Console.WriteLine ("Variable 2 :"+vari2); Console.Write("Zahl (*):"); string a = Console.ReadLine(); if (a == "=") { break; } if (a == "var1") { summe = summe * vari1; } if (a == "var2") { summe = summe * vari2; } else { try { summe = summe * Convert.ToDouble(a); } catch { } } }while(true); return(summe); } static Double Div() {Double summe = 0;string summe1 = ""; try{ do{ Console.WriteLine(""); Console.Write("Zahl :"); summe1 =Convert.ToString( Console.ReadLine()); }while(Convert.ToDouble(summe1) <= 0); summe = Convert.ToDouble(summe1); }catch{} if(summe <= 0) {summe = 1;} do{ Console.Clear(); Console.WriteLine("= zum beenden eingeben !"); Console.WriteLine("Ergebnis = "+summe); Console.WriteLine (""); Console.WriteLine ("Variable 1 :"+vari1); Console.WriteLine ("Variable 2 :"+vari2); Console.Write("Zahl (/):"); string a = Console.ReadLine(); if (a == "=") { break; } if (a == "var1") { summe = summe / vari1; } if (a == "var2") { summe = summe / vari2; } else { try { if(Convert.ToDouble(a) != 0) { summe = summe / Convert.ToDouble(a); }else{Console.WriteLine("nicht möglich !"); System.Threading.Thread.Sleep(2400); } } catch { } } }while(true); return(summe); } static void Einführung() {Console.Clear(); Console.WriteLine ("+ Plus rechnen"); Console.WriteLine ("- Minus rechnen"); Console.WriteLine ("* Mal rechnen"); Console.WriteLine ("/ Dividiert rechnen"); Console.WriteLine (""); Console.WriteLine ("var1 variable 1 ändern "); Console.WriteLine ("var2 variable 2 ändern "); Console.WriteLine (""); Console.WriteLine ("Variable 1 :"+vari1); Console.WriteLine ("Variable 2 :"+vari2); Console.WriteLine (""); Console.Write (">"); if(vari2 == 0){vari2 = 1;Console.WriteLine ("0 nicht erlaubt !");Console.ReadLine();} if(vari1 == 0){vari1 = 1;Console.WriteLine ("0 nicht erlaubt !");Console.ReadLine();} } } } |
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Greetings! Very helpful advice in this post! This is the little changes that will make
the most crucial changes. Thanks for sharing!