#include<iostream> using namespace std; int main(){ float a=1,b=3,c=5,d=7,e=9; cout<<3.1415926*a*a<<endl; cout<<3.1415926*b*b<<endl; cout<<3.1415926*c*c<<endl; cout<<3.1415926*d*d<<endl; cout<<3.1415926*e*e<<endl; return 0; }