#include <iostream> using namespace std; int main(){ double a,b,c,d,e,; a = 3.1415926*1.0*1.0; b = 3.1415926*3.0*3.0; c = 3.1415926*5.0*5.0; d = 3.1415926*7.0*7.0; e = 3.1415926*9.0*9.0; cout<<a<<" "<<b<<" "<<c<<" "<<d<<" "<<e; }