#include<iostream> using namespace std; int main() { double s1,s2,s3,s4,s5; s1=3.1415926*1*1; s2=3.1415926*3*3; s3=3.1415926*5*5; s4=3.1415926*7*7; s5=3.1415926*9*9; printf("%lf\n%lf\n%lf\n%lf\n%lf\n",s1,s2,s3,s4,s5); return 0; }