# 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 ` `#include // 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::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::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 ` `#include // 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::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::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 ` `#include // 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::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::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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