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ratio_less() function in C++

Last Updated : 26 Jul, 2018
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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: CPP
// 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: CPP
// 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

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