How Do I Can Convert It Into Pseudocode

#include<iostream>
#include<math.h>
#include<iomanip>
using namespace std;

int main ()
{
    int Geometry_Calculator,Calculate_the_Area_of_a_Rectangle,width,length,Quit,choice;
    double Calculate_the_Area_of_a_Triangle,base,height;
    float Calculate_the_Area_of_a_Circle,radius;
    
    cout<<"Geometry_Calculator"<<endl;
    cout<<"1.Calculate_the_Area_of_a_Circle"<<endl;
    cout<<"2.Calculate_the_Area_of_a_Rectangle"<<endl;
    cout<<"3.Calculate_the_Area_of_a_Triangle"<<endl;
    cout<<"4.Quit"<<endl;
    cout<<"Enter_your_choice (1-4):"<<endl;
    cin>>choice;
    
    switch (choice)
    {
           
      case 1:cout<<fixed<<showpoint;
            cout<<setprecision (2); 
            cout<<"Enter radius:";
            cin>>radius;
            Calculate_the_Area_of_a_Circle=3.14159*(pow(radius,2));
            cout<<"Total_Area_of_a_Cirlce:"<<Calculate_the_Area_of_a_Circle<<endl;
            break;
      case 2:cout<<"Enter width:";
             cin>>width;
             cout<<"Enter length:";  
             cin>>length; 
             Calculate_the_Area_of_a_Rectangle=width*length;
             cout<<"Total_Area_of_a_Rectangle:"<<Calculate_the_Area_of_a_Rectangle<<endl;
         break;
      case 3:cout<<"Enter base:";
             cin>>base;
             cout<<"Enter height:";
             cin>>height;
             Calculate_the_Area_of_a_Triangle=0.5*(base*height);
             cout<<"Total_Area_of_a_Triangle:"<<Calculate_the_Area_of_a_Triangle<<endl;
         break;
      case 4:cout<<"Quit"<<endl;
         break;
      
      default:cout<<"Wrong input.Please try again."<<endl;
    }   
    
    system ("pause");
    return 0;
                
}