ratio_less() function in C++

The ratio_less() is an inbuilt function in C++ which checks if the ratio R1 is less than the ratio R2. It returns True if the ratio is less than ratio 2, else it returns false.

Syntax:

template < class ratio1_name, class ratio2_name > ratio_less

Template Parameters: The function accepts two template parameters ratio1 and ratio2 which are to be compared.

Return value: The function returns a boolean value which is true if the ratio1 is less than ratio2 otherwise it returns false.

Below programs illustrates the above function:

Program 1:

// C++ program to illustrate the
// ratio_less function
#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<ratio1, ratio2>::value)
        cout << "3/9 is less than 1/3";
    else
        cout << "3/9 is not less than 1/3";

    return 0;
}

Output:

3/9 is not less than 1/3

Program 2:

// C++ program to illustrate the
// ratio_less function
#include <iostream>
#include <ratio>
using namespace std;
int main()
{
    typedef ratio<1, 2> ratio1;
    typedef ratio<4, 7> ratio2;

    // check if R1<R2
    if (ratio_less<ratio1, ratio2>::value)
        cout << "1/2 is less than 4/7";
    else
        cout << "1/2 is not less than 4/7";

    return 0;
}

Output:

1/2 is less than 4/7