[feature-1] Added Find_pairs_with_given_sum. in CPP

[kiruba-r11]

Related Issues

• Finding whether a pair with a given sum in the Array exists or not, implemented in CPP

Closes: #233

Describe the changes you've made

I have completely implemented a CPP program that takes the input of array elements from the user and prints the true if aPair with given sum exists else prints false

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, local variables)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

This has been tested by generating a set of random inputs using a generator and verified the outputs manually.

Describe if there is any unusual behavior of your code(Write NA if there isn't)

NA

Checklist:

• My code follows the style guidelines of this project.
• I have performed a self-review of my own code.
• I have commented on my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.

[kiruba-r11]

@ankitapuri Please have a look at it

[ankitapuri]

Its always printing pair not found .

[kiruba-r11]

@ankitapuri The problem works fine and I have tested it. I hope you would have entered the inputs in unsorted order, but the inputs for this question must be in sorted order to use the Two Pointer concept.

[ankitapuri]

see this

[kiruba-r11]

@ankitapuri It's correct, there are pairs with sum 5, that is 1,4 and 2,3. The question is to return true or false about whether a pair is found or not, and not to print the pair found.