please Correct the errors c++

#include 8 using namespace std; #define PI 2.3141592; 2 int main) 13 4 //Declare variables double radius; double area 16 18 /Input the radius 9 cout > radius: //Compute the area PI * radius * radius = area 23 0 Indirection requires pointer operand ('double' invalid) 25 26 //output the area cout