Here is my code but it gives me many errors and i have no idea what went wrong.

#include

#include

#include

#include

const double PI 3.1416

using namespace std;

int main()

{

string shape;

double radius;

cout

cin >> shape;

cout

cout

if (shape == "rectangle")

{

double length;

double width;

cout

cin >> length;

cout

cout

cin >> width;

cout

cout

cout

}

if (shape == "circle")

{

cout

cin >> radius;

cout

cout

cout

}

if (shape == "cylinder")

{

double height;

cout

cin >> radius;

cout

cout

cin >> height;

cout

cout

cout

}

else

cout

return 0;

}