Added the code for detecting a graph in a directed graph in c++

[ranisnehal]

I have created a issue -2056

hey maintainers please check this as it will fix this issue

• Info about Issue or bug fixes #2056 and #2059

Describe the changes you've made

A clear and concise description of my issue was that i have created a new algorithm to find the number of cycles in the directed graph

Language Used:

c++

Checklist:

• [ ] I have placed my code file in the (/Code) Folder e.g. If it's a Code in c++ then I have placed my code pr_name.java file in (/Code/Java/) Directory.
• [ ] I have Added the Description, Approach, and Working of Code at the beginning of Code.
• [ ] I have added 2 or more Testcases at the Bottom side of the Code.
• [ ] I have Added Time and Space Complexity at the End of the Code.
• [ ] I have Explained the Variables use in Complexity e.g. O(n) where n is the length of an array.
• [ ] I have Updated the Readme Related to the Topics e.g., if the issue is regarding Matrix then Update the Readme.MD present in 2D_Array Folder.
• [ ] I have added Proper Comments in between the Code for Better Explanation.
• [ ] I have sorted the list of the Readme.MD where I have added the issue in the Alphabetical Order.

[github-actions[bot]]

AlgoTree team will review your PR soon. Take Care of Few of the Things where most contributors are missing out. @ranisnehal :)