Recieving error ( Exit was not declared in scope) need help getting code to run

Question

Recieving error ( Exit was not declared in scope) need help getting code to run and also need //comments for each line explaining what they do

#include "circle.h" //define the circle.h header file in the same location where the program is saved
#include "square.h" //define the square.h header file in the same location where the program is saved
#include <iostream>
using namespace std;

int main()
{
char type;
while(true)
{
cout << "Enter type of figure(C - Circle, S - Square or Q - quit: "; cin >> type;
if(type == 'C')
{
Circle* c = new Circle;
c->input();
c->print();
delete c;
}
else if(type == 'S')
{
Square* s = new Square;
s->input();
s->print();
delete s;
}
else if(type == 'Q')
exit(0);
else
cout << "Invalid ";

cout << endl;
}

}

Explanation / Answer

Please update your code as follows:

Updated Code:

#include <iostream>
#include <stdlib.h> //Header file for exit

#include "circle.h" //define the circle.h header file in the same location where the program is saved
#include "square.h" //define the square.h header file in the same location where the program is saved

using namespace std;

int main()
{
   char type;
  
   //Loop till user want to quit
   while(true)
   {
       //Prompt user for option
       cout << "Enter type of figure(C - Circle, S - Square or Q - quit: "; cin >> type;
      
       //If user enter C
       if(type == 'C')
       {
           //Creating a pointer Circle object
           Circle* c = new Circle;
           c->input(); //Calling input method present in Circle class
           c->print(); //Calling print method present in Circle class
           delete c; //Deleting dynamically created object
       }
      
       //If user enter S
       else if(type == 'S')
       {
           //Creating a pointer Square object
           Square* s = new Square;
           s->input(); //Calling input method present in Square class
           s->print(); //Calling print method present in Square class
           delete s; //Deleting dynamically created object
       }
      
       //If user enter Q
       else if(type == 'Q')
           exit(0); //Exit from program
       else
           cout << "Invalid ";

       cout << endl;
   }
}

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