PLEASE HELP WITH C Question When setting the dimensions of a

PLEASE HELP WITH C++!!

Question:

When setting the dimensions of a geometric object, the lengths of the sides should be positive values. Write a program that repeatedly asks for the dimensions of a rectangle and displays the area. Before an error is presented, collected both the length and the width values in a new class called Rectangle.

Create a class DimError, that is used by the new Rectangle class. The following methods must be defined for the Rectangle object:

void Rectangle::setWidth(int width);

void Rectangle::setLength(int length);

If either setWidth or setLength is called with a negative value it throws a DimError that includes a message indicating which method was called and the reason for the error. Use the main function defined below to produce the output that follows

main:

int main(void) {

Rectangle r;

try {

while (true) {

int l, w;

cout << \"Enter a length: \";

cin >> l;

cout << \"Enter a width: \";

cin >> w;

r.setLength(l);

r.setWidth(w);

cout << \"The area is: \" << r.area() << endl;

}

} catch (DimError de) {

cout << \"Couldn\'t set the rectangle\'s dimensions: \" << endl

<< de.what() << endl;

}

cout << \"Exiting...\" << endl;

return 0;

}

output:

Enter a length: 5

Enter a width: 10

The area is: 50

Enter a length: 3

Enter a width: 3

The area is: 9

Enter a length: -3

Enter a width: 5

Couldn\'t set the rectangle\'s dimensions:

setLength called with a negative length.

Exiting...

Press any key to continue . . .

Solution

#include <iostream>

/* run this program using the console pauser or add your own getch, system(\"pause\") or input loop */
using namespace std;
class DimError{
   public:
       void what(){
           cout <<\"\ Negative values are not allowed:\ \" ;
       }
};
class Rectangle{
   private:
       int length,width;
   public:
       void setLength(int length){
           if(length >=0){
                  
               this->length =length;
           }
           else{
               DimError d;
               d.what();
               exit(0);
           }
       }
       void setWidth(int width){
           if(width >=0){
          
      
              
               this->width =width;
           }
           else{
           DimError d;
               d.what();
               exit(0);
           }
       }
       void area(){
           cout << (width*length) << \"\ \";
       }
};

int main(int argc, char** argv) {
   Rectangle r;
   try {
   while (true) {
       int l, w;
       cout << \"Enter a length: \";
       cin >> l;
       cout << \"Enter a width: \";
       cin >> w;
       r.setLength(l);
       r.setWidth(w);
       cout << \"The area is: \";
       r.area();
   }
   }
   catch (DimError de) {
       cout << \"Couldn\'t set the rectangle\'s dimensions: \" << endl;
       de.what();
   }
   cout << \"Exiting...\" << endl;
   return 0;
}