Ratio Manipulations in C++ | Set 2 (Comparison)

Prerequisite – Ratio Manipulations in C++ | Set 1(Arithmetic)

In C++, the <ratio> header file allows us to manipulate ratios using various inbuilt template alias. The header file was introduced from C++11 onwards. In this article, we will be discussing the Comparison of Ratio Manipulations in C++. The following functions are used:

• ratio_equal
• ratio_not_equal
• ratio_greater
• ratio_less
• ratio_greater_equal
• ratio_less_equal

1. ratio_equal: This template alias checks if the ratios in its arguments are equal. Returns true if equal, else returns false. It returns a boolean member constant “value”. 

2. ratio_not_equal: This template alias checks if the ratios in its arguments are not equal. Returns true if not equal, else if equal returns false. It returns a boolean member constant “value”.  

CPP

// C++ code to demonstrate the working of
// ratio_equal and ratio_not_equal
#include <iostream>
#include <ratio> // for ratio manipulation
using namespace std;

// Driver Code
int main()
{
    // Declaring ratios
    typedef ratio<10, 100> ratio1;
    typedef ratio<1, 10> ratio2;

    // Checking if ratios are equal using ratio_equal
    ratio_equal<ratio1, ratio2>::value
        ? cout << "Ratios are equal"
        : cout << "Ratios are not equal";
    cout << endl;

    // Checking if ratios are not equal using
    // ratio_not_equal
    ratio_not_equal<ratio1, ratio2>::value
        ? cout << "Ratios are not equal"
        : cout << "Ratios are equal";

    return 0;
}

Output

Ratios are equal
Ratios are equal

3. ratio_greater: This temporary alias checks if ratio1 is greater than ratio2. It returns a boolean member constant “value” which returns true if ratio1 is greater than ratio2 else returns false.

4. ratio_less: This temporary alias checks if ratio1 is less than ratio2. It returns a boolean member constant “value” which returns true if ratio1 is less than ratio2 else returns false. 

CPP

// C++ code to demonstrate the working of
// ratio_greater and ratio_less
#include <iostream>
#include <ratio> // for ratio manipulation
using namespace std;

// Driver Code
int main()
{
    // Declaring ratios
    typedef ratio<10, 100> ratio1;
    typedef ratio<11, 100> ratio2;

    // Checking if ratio1 is greater than ratio2
    // using ratio_greater
    ratio_greater<ratio1, ratio2>::value
        ? cout << "ratio1 is greater than ratio2"
        : cout << "ratio1 is not greater than ratio2";
    cout << endl;

    // Checking if ratio1 is less than ratio2
    // using ratio_less
    ratio_less<ratio1, ratio2>::value
        ? cout << "ratio1 is less than ratio2"
        : cout << "ratio1 is not less than ratio2";
    cout << endl;

    return 0;
}

Output

ratio1 is not greater than ratio2
ratio1 is less than ratio2

5. ratio_greater_equal: This temporary alias checks if ratio1 is greater or equal than ratio2. It returns a boolean member constant “value” which returns true if ratio1 is greater or equal than ratio2 else returns false.

6. ratio_less_equal: This temporary alias checks if ratio1 is less or equal than ratio2. It returns a boolean member constant “value” which returns true if ratio1 is less or equal than ratio2 else returns false. 

CPP

// C++ code to demonstrate the working of
// ratio_greater_equal and ratio_less_equal
#include <iostream>
#include <ratio> // for ratio manipulation
using namespace std;

// Driver Code
int main()
{
    // Declaring ratios
    typedef ratio<10, 100> ratio1;
    typedef ratio<1, 10> ratio2;

    // Checking if ratio1 is greater or equal than ratio2
    // using ratio_greater_equal
    ratio_greater_equal<ratio1, ratio2>::value
        ? cout << "ratio1 is greater or equal than ratio2"
        : cout << "ratio1 is not greater or equal than "
                  "ratio2";
    cout << endl;

    // Checking if ratio1 is less or equal than ratio2
    // using ratio_less_equal
    ratio_less_equal<ratio1, ratio2>::value
        ? cout << "ratio1 is less or equal than ratio2"
        : cout << "ratio1 is not less or equal than ratio2";
    cout << endl;

    return 0;
}

Output

ratio1 is greater or equal than ratio2
ratio1 is less or equal than ratio2

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