static void Main(string[] args) { Class1 c = new Class1(); Console.WriteLine(c.Sub(4, 3)); }
public static void Main(String [] args) { Class1 m = new Class1(); while (true) { Console.WriteLine("1.Add"); Console.WriteLine("2.Sub"); Console.WriteLine("3.Mult"); Console.WriteLine("4.Div"); Console.WriteLine("5.Prime/!Prime"); Console.WriteLine("6.Fact"); Console.WriteLine("7.Exit"); Console.WriteLine("Enter your choice"); var ch = int.Parse(Console.ReadLine()); switch (ch) { case 1: { float result; Console.WriteLine("Enter value of a and b"); var a = float.Parse(Console.ReadLine()); var b = float.Parse(Console.ReadLine()); m.Add(out result, ref a, ref b); Console.WriteLine("Addition of two numbers is = " + result); } break; case 2: { float result; Console.WriteLine("Enter value of a and b"); var a = float.Parse(Console.ReadLine()); var b = float.Parse(Console.ReadLine()); m.Sub(out result, ref a, ref b); Console.WriteLine("Subtraction of two numbers is = " + result); } break; case 3: { float result; Console.WriteLine("Enter value of a and b"); var a = float.Parse(Console.ReadLine()); var b = float.Parse(Console.ReadLine()); m.Mul(out result, ref a, ref b); Console.WriteLine("Multiplication of two numbers is = " + result); } break; case 4: { float result; Console.WriteLine("Enter value of a and b"); var a = float.Parse(Console.ReadLine()); var b = float.Parse(Console.ReadLine()); m.Div(out result, ref a, ref b); Console.WriteLine("Divison of two numbers is = " + result); } break; case 5: { string result; Console.WriteLine("Enter value of a"); var a = int.Parse(Console.ReadLine()); Console.WriteLine("Is number Prime = " + m.chckPrime(ref a)); } break; case 6: { Console.WriteLine("Enter value of a"); int a = int.Parse(Console.ReadLine()); m.Fact(ref a); Console.WriteLine("Factorial of number = " + a); } break; case 7: { Environment.Exit(0); } break; default: Console.WriteLine("You have entered the wrong option"); break; } } }