Has any one got any idea why this doesn;t work!!

Code://Program to find circle values. #include <iostream> using namespace std; int main() { float radius; float pi; pi = 3.14; float r2; r2 = radius*radius; float area; area = pi*r2; { cout << "Please input a radius so that I can work out the area of the circle!\n"; cin >> radius; cout << "Thankyou! Your answer is below:\n"; cout << "you entered:" << radius; cout << "/ncurrent status: not working"; //the above line is a debugging tool } return 0; }