this program is meant to let the user choose which shape they want to calculate the surface area of. so if they select 1, it goes to a sphere, and they enter the radius, and then the program gives them back the surface area. and so on for the other 3 shapes. the problem i'm having is that the first time i try to do any of these shapes, i am getting ridiculous answers that are incorrect, but if i try a second time, without exiting the program, then they work correctly. for example, if i run the program and choose the sphere, and enter a radius of 1, the answer i get is 221589529710308. obviously incorrect, way too large. but if i just hit 1 again, and redo it, then i get 12.5664, which is the correct answer. any ideas as to what may be causing this?

Code:#include <iostream> #include <iomanip> #include <string> #include <math.h> using namespace std; int main() { int choice, radius_sphere, radius_cone, length_cone, length_rectprism, width_rectprism, height_rectprism, length_pyramid, height_pyramid; double surface_area_sphere, surface_area_cone, surface_area_rectprism, surface_area_pyramid; const double PI=3.14159; cout<<"\nSurface Area Calculator" <<"\n1) Sphere" <<"\n2) Cone" <<"\n3) Rectangular Prism" <<"\n4) Pyramid" <<"\n\n5) Quit" <<"\n\nEnter Your Choice: "; cin>>choice; while (choice>5) { cout<<"\nInvalid number, please try again: "; cin>>choice; } while (choice<5) { if (choice==1) { surface_area_sphere=4*PI*radius_sphere*radius_sphere; cout<<"\nPlease enter the radius of the sphere: "; cin>>radius_sphere; cout<<"\nThe surface area of the sphere is "<<fixed<<setprecision (4)<<surface_area_sphere; cout<<"\n\nSurface Area Calculator" <<"\n1) Sphere" <<"\n2) Cone" <<"\n3) Rectangular Prism" <<"\n4) Pyramid" <<"\n\n5) Quit" <<"\n\nEnter Your Choice: "; cin>>choice; while (choice>5) { cout<<"\nInvalid number, please try again: "; cin>>choice; } } if (choice==2) { surface_area_cone=(PI * radius_cone * length_cone) + (PI * radius_cone * radius_cone); cout<<"\nPlease enter the radius of the cone: "; cin>>radius_cone; cout<< "\nplease enter the length of the cone: "; cin>>length_cone; cout<<"\nThe surface area of the cone is "<< fixed<<setprecision (4)<<surface_area_cone; cout<<"\n\nSurface Area Calculator" <<"\n1) Sphere" <<"\n2) Cone" <<"\n3) Rectangular Prism" <<"\n4) Pyramid" <<"\n\n5) Quit" <<"\n\nEnter Your Choice: "; cin>>choice; while (choice>5) { cout<<"\nInvalid number, please try again: "; cin>>choice; } } if (choice==3) { surface_area_rectprism=(2*length_rectprism*width_rectprism)+(2*width_rectprism*height_rectprism)+(2*length_rectprism*height_rectprism); cout<<"\nPlease enter the length of the prism: "; cin>>length_rectprism; cout<<"\nPlease enter the width of the prism: "; cin>>width_rectprism; cout<<"\nPlease enter the height of the prism: "; cin>>height_rectprism; cout<<"\nThe surface area of the rectangular prism is: "<<fixed<<setprecision (4)<<surface_area_rectprism; cout<<"\n\nSurface Area Calculator" <<"\n1) Sphere" <<"\n2) Cone" <<"\n3) Rectangular Prism" <<"\n4) Pyramid" <<"\n\n5) Quit" <<"\n\nEnter Your Choice: "; cin>>choice; while (choice>5) { cout<<"\nInvalid number, please try again: "; cin>>choice; } } if (choice==4) { surface_area_pyramid=(2*length_pyramid*height_pyramid)+(length_pyramid*length_pyramid); cout<<"\nPlease enter the length of the pyramid: "; cin>>length_pyramid; cout<<"\nPlease enter the height of the pyramid: "; cin>>height_pyramid; cout<<"\nThe surface area of the pyramid is: "<<fixed<<setprecision (4)<<surface_area_pyramid; cout<<"\n\nSurface Area Calculator" <<"\n1) Sphere" <<"\n2) Cone" <<"\n3) Rectangular Prism" <<"\n4) Pyramid" <<"\n\n5) Quit" <<"\n\nEnter Your Choice: "; cin>>choice; while (choice>5) { cout<<"\nInvalid number, please try again: "; cin>>choice; } } } return 0; }