ratio_less_equal() function in C++

// C++ program to illustrate the
// ratio_less_equal function
// when both the ratios are equal
#include <iostream>
#include <ratio>
using namespace std;
int main()
{
    typedef ratio<3, 9> ratio1;
    typedef ratio<1, 3> ratio2;

    // check if R1<=R2
    if (ratio_less_equal<ratio1, ratio2>::value)
        cout << "3/9 is less than or equal to 1/3";
    else
        cout << "3/9 is greater than 1/3";

    return 0;
}

// C++ program to illustrate the
// ratio_less_equal function
// to show less than
#include <iostream>
#include <ratio>
using namespace std;
int main()
{
    typedef ratio<1, 3> ratio1;
    typedef ratio<1, 2> ratio2;

    // check if R1<=R2
    if (ratio_less_equal<ratio1, ratio2>::value)
        cout << "1/3 is less than or equal to 1/2";
    else
        cout << "1/3 is greater than 1/2";

    return 0;
}

// C++ program to illustrate the
// ratio_less_equal function
// to show when greater than
#include <iostream>
#include <ratio>
using namespace std;
int main()
{
    typedef ratio<1, 8> ratio1;
    typedef ratio<1, 10> ratio2;

    // check if R1<=R2
    if (ratio_less_equal<ratio1, ratio2>::value)
        cout << "1/8 is less than or equal to 1/10";
    else
        cout << "1/8 is greater than 1/10";

    return 0;
}