Using switch statement to get same output

[tetsuuuu]

How would you write out the code using switch statements to get the same output. If you can, please write a comment next to the lines changed to provide a brief explanation of what that line does. I am a beginner and looking to learn more about this language.
Thanks in advance!

#include<iostream>
using namespace std;
int main()
{int choice;
 double s, l, w , r, d, b, h, ls, pi = 3.14159;
 do{cout<<"\nGeometry Calculator"
 		<<"\n-------------------"
 		<<"\n1) SQUARES"
 		<<"\n2) RECTANGLES"
 		<<"\n3) CIRCLES"
 		<<"\n4) TRIANGES"
 		<<"\n5) Quit"
 		<<"\nYour Selection? ";
 	cin>>choice;
 	if(choice==1)
 		{cout<<"\nSide Legnth? ";
 		 cin >> s;
 		 cout<<"\nPerimeter is ="<<s*4
 		 	 <<"\nArea is = "<<s*s<<"\n";
 		}
 	if(choice==2)
 		{cout<<"\nLength? ";
 		 cin>>l;
 		 cout<<"\nWidth? ";
 		 cin>>w;
 		 cout<<"\nPerimeter is = "<<l+l+w+w
 		 	 <<"\nArea is = "<<l*w;
		}
	if(choice==3)
		{cout<<"\nRadius? ";
		 cin>>r;
		 cout<<"\nDiameter = "<<2*r;
		 cout<<"\nCircumference = "<<2*r*pi;
		 cout<<"\nArea = "<<pi*(r*r);		 
 	    }
 	if(choice==4)
 		{cout<<"\Base? ";
 		 cin>>b;
 		 cout<<"\nHeight? ";//assuming its a right triangle, then the height is one of the sides 
 		 cin>>h;
 		 cout<<"\nLast Side? ";
 		 cin>>ls;
 		 cout<<"\nArea = "<<(b*h) / 2;
 		 cout<<"\nPerimeter = "<<b+h+ls;
 		}
   }while(choice!=5);
 cout<<"Thanks for using the calculator. ";
 cout<<"\n\n";
 return 0;  
}

[George P]

What advantage would using an array give you over what you currently have?

About the sole advantage I can see is the ability to keep a history of what choices were made. The program would not be enhanced as written using an array.

Since the number of iterations is variable -- the user requests as many or as few calculations as they want -- I would use a std::vector over a regular sized-at-compile-time array.
https://en.cppreference.com/w/cpp/container/vector

One change I would make that could streamline the program is using a switch statement instead of so many ifs. A switch would make adding new choices much easier.
https://en.cppreference.com/w/cpp/language/switch

I would also declare PI as a constant since the value should not be alterable.

[tetsuuuu]

Thank you for the clarification. I seem to have mistaken arrays for switch statements. I was thinking about ways to use less ifs and thought the way to fix that was using arrays.

I will edit the question.

[George P]

I already gave you a link about the switch statement. Here's a link to a tutorial about the statement you might find helpful:
https://www.learncpp.com/cpp-tutorial/53-switch-statements/

I could write the code for you, but you'll learn more if you make the attempt first yourself. If you are still stuck post the updated code and we can help.

[tetsuuuu]

Thanks for the resources. I'll give it a try