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