Mine
public text v1 · immutable#include <iostream>
#include <math.h>
#include <stdio.h>
using namespace std;
int main(){
long double a,b,c;
cin >> a >> b;
c=3.141592654*(a*a-b*b/4);
cout << c << "\n";
printf("%f",c);
system("PAUSE");
}#include <iostream>
#include <math.h>
#include <stdio.h>
using namespace std;
int main(){
long double a,b,c;
cin >> a >> b;
c=3.141592654*(a*a-b*b/4);
cout << c << "\n";
printf("%f",c);
system("PAUSE");
}