Question

Consider the following C++ program in which the statements are in the incorrect order.

Rearrange the statements so that it prompts the user to input the radius of a circle and outputs the area and circumference of the circle.

#include <iostream>
 
{
 
int main()
 
cout << "Enter the radius: ";
 
cin >> radius;
 
cout << endl;
 
double radius;
double area;
 
using namespace std;
 
return 0;
 
cout << "Area = " << area << endl;
 
area = PI * radius * radius;
 
circumference = 2 * PI * radius;
 
cout << "Circumference = " << circumference << endl;
 
const double PI = 3.14;
 
double circumference;
}

Answer 1

#include <iostream>

using namespace std;

int main()
{
    const double PI = 3.14;
    
    cout << "Enter the radius: ";

    double radius;
    cin >> radius;

    double area;
    area = PI * radius * radius;
 
    double circumference;
    circumference = 2 * PI * radius;

    cout << endl;
    cout << "Area = " << area << endl;
    cout << "Circumference = " << circumference << endl;

    return 0;
}