#include <iostream>
using namespace std;
void calc(double a, double b, double &s, double &d, double &p, double &q) {
s = a + b;
d = a - b;
p = a * b;
q = a / b;
}
int main() {
double a, b, s, d, p, q;
cout << "a = ";
cin >> a;
cout << "b = ";
cin >> b;
calc(a, b, s, d, p, q);
cout << "a + b = " << s << endl;
cout << "a - b = " << d << endl;
cout << "a * b = " << p << endl;
cout << "a / b = " << q << endl;
return 0;
}
/* end */