Help me switch to no if-else coding?

[SelNasser]

Hi all,

I'm working on an assignment and I've been asked to change my code so that I am not using any if or if else coding...

So as of now, my full code works perfecting but uses If Else and I've been trying everything but I can't seem to find a good alternative. Here's a small sample of what I have, I don't want to post the whole thing since I don't want my prof to flag me for plagiarism lol

....

case 2:
cout << endl;
cout << "\t\tCalcul ate the area of a Rectangle\n\n";
cout << "\tEnter length: ";
cin >> length;

cout << "\tEnter width: ";
cin >> width;
if (length <= 0 || width <= 0)
{
cout << endl;
cout << "\tEnter a positive value.\n\n";

}
else
{
RectArea = length * width;
cout << "\tArea= " << RectArea << " square units.";
}
break;
...

I've used this if else coding for the other sections (case 1 is the circle, case 2 is the rectangle, case 3 is the triangle). Just a basic geometry calculator...

I don't want anyone to do the work for me, I just really need help knowing what alternative I should use. I'm on thin ice with my prof, so I'd rather not ask him... thank you so so so much!

[Clearner321]

The option I can think of is a ternary operator.

[weaknessforcats]

Try writing functions.

struct Rect
{
   int length;
   int width;

};

Rect r;

GetData(&r);   //enter the data
int area = CalcArea(&r);  
DisplayArea(&area);

Then you can introduce object based code:

Rect r;  //the object;
     r.GetData();
     r.CalacArea();
     r.DisplayArea();

The thing with if/else coding is that the logic threads don't stay separated. They intertwine to form spaghetti which s nearly impossible to understand.

This is enough hints for now.

[donbock]

Another option is to use a loop:

do {
 length = width = 0;
 cout << "\tEnter length: ";
 cin >> length;
 cout << "\tEnter width: ";
 cin >> width;
 } while ((length <= 0) || (width <= 0));