How to use the ratio_add() function in C++
Harsh JainIn this shot, we will learn how to use the ratio_add() function. This template alias is used to add the two ratios.
The
ratio_add()function is available in<ratio>header file in C++.
What is a ratio?
A ratio is a representation of a fraction in which the numerator and denominator are differentiated by a colon (:) symbol. The numerator and denominator can be of float data type.
Let’s understand with the help of an example. Suppose that the first ratio is 1 : 3 and the second ratio is 5 : 2.
So, the result of the ratio_add() function on these two ratios gives the result as 17 : 6. Let’s dive into how the addition took place.
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First, we need to find the
LCM Lowest Common Multiple -
The LCM of 3 and 2 is 6.
-
Now addition = =
Parameters
The ratio_add() method takes the following parameters:
Ratio1: Aratioobject for addition.Ratio2: Anotherratioobject to perform the addition with the firstratioobject.
Return value
This function returns the result of addition in the simplest form. It returns two member constants:
num: The simplified numerator of the ratio after the addition of the two ratios.den: The simplified denominator of the ratio after the addition of the two ratios.
Code
Let’s have a look at the code.
#include <iostream>
#include <ratio>
using namespace std;
int main()
{
typedef ratio<1, 3> ratio1;
typedef ratio<5, 2> ratio2;
typedef ratio_add< ratio1, ratio2 > sum;
cout << "The ratio after addition is : ";
cout << sum::num << "/" << sum::den;
return 0;
}
Explanation
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In lines 1 and 2 we imported the required header files.
-
In line 5 we made a
main()function. -
From lines 7 and 8 we declared two ratios.
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In line 10 we performed the sum of the two declared ratios by using
ratio_add()function. -
In line 12 we displayed a message regarding the result.
-
In line 13 we displayed the numerator and denominator by accessing them through the sum variable and displayed the result.
In this way, we can use the ratio_add() function to add two ratios and get the addition in the simplest form.
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