>>843

#include <iostream>

main()
{
 double x, y;
 std::cout << "Xを入力して" << std::endl;
 std::cin >> x;
 std::cout << "Yを入力して" << std::endl;
 std::cin >> y;
 std::cout << "X+Y=" << X+Y << std::endl;
 std::cout << "X-Y=" << X-Y << std::endl;
 std::cout << "X*Y=" << X*Y << std::endl;
 std::cout << "X/Y=" << X/Y << std::endl;
}