C# Programming: From Problem Analysis to Program Design 4 edition (Chapter 10 PE

Question

C# Programming: From Problem Analysis to Program Design 4 edition (Chapter 10 PE 7 & 8) 7. The computer club is selling T-Shirts. Create an attractive user interface that allows users to select sizes (S, M, L, XL) and quantity. Which controls would be most appropriate? Remember, the fewer keystrokes required of the user the better. Display the selections made by the user with the Process menu option. Include an option to exit the application. 8. Add to your solution in Exercise 7 by including two more sizes, XSmall and XXLarge. Add statements that process the order by calculating the total cost. Each shirt is $16 except the XSmall and XXLarge; their specialty prices are $20 each. Allow users to purchase different sizes on the same order. Include an "Add to Cart" option from the Process menu that enables the user to add multiple selections to the order. Display the total cost for each selection and the final cost for the order. Include a Help menu option that displays instructions.

Note,please with a screen shot of the output.if possible you can include the procedure

Explanation / Answer

namespace UnitsOfMeasure
{
public interface IUnit { }
public static class Length
{
public interface ILength : IUnit { }
public class m : ILength { }
public class mm : ILength { }
public class ft : ILength { }
}
public class Mass
{
public interface IMass : IUnit { }
public class kg : IMass { }
public class g : IMass { }
public class lb : IMass { }
}

public class UnitDouble<T> where T : IUnit
{
public readonly double Value;
public UnitDouble(double value)
{
Value = value;
}
public static UnitDouble<T> operator +(UnitDouble<T> first, UnitDouble<T> second)
{
return new UnitDouble<T>(first.Value + second.Value);
}
//TODO: minus operator/equality
}
}

class Unit
{
double scalar;
int kg;
int m;
int s;
// ... for each basic unit

public Unit(double scalar, int kg, int m, int s)
{
this.scalar = scalar;
this.kg = kg;
this.m = m;
this.s = s;
...
}

// For addition/subtraction, exponents must match
public static Unit operator +(Unit first, Unit second)
{
if (UnitsAreCompatible(first, second))
{
return new Unit(
first.scalar + second.scalar,
first.kg,
first.m,
first.s,
...
);
}
else
{
throw new Exception("Units must match for addition");
}
}

// For multiplication/division, add/subtract the exponents
public static Unit operator *(Unit first, Unit second)
{
return new Unit(
first.scalar * second.scalar,
first.kg + second.kg,
first.m + second.m,
first.s + second.s,
...
);
}

public static bool UnitsAreCompatible(Unit first, Unit second)
{
return
first.kg == second.kg &&
first.m == second.m &&
first.s == second.s
...;
}
}

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