#include <iostream> using namespace std; int main() { double s1,s2,s3,s4,s5,pi=3.1415926; s1 = 1*1*pi; s2 = 3*3*pi; s3 = 5*5*pi; s4 = 7*7*pi; s5 = 9*9*pi; cout << s1 <<endl; cout << s2 <<endl; cout << s3 <<endl; cout << s4 <<endl; cout << s5 <<endl; }