String vowel counting in C++ and common characters between 2 words in C++

[Gautam-Diwan]

Description

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Program Name - vowelCount.cpp
Issue No.- #278

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Checklist(self check)

• [ x] Yes, this task assigned to me.
• [✅ ] My code follows the style guidelines(Clean Code) of this project
• [✅ ] I have performed a self-review of my own code
• [✅ ] My Filename is in camelCase format
• [✅ ] I have added Problem statement, Problem link in file.

[Gautam-Diwan]

Description

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Program Name - commonLetters.cpp
Issue No.- #289

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Checklist(self check)

• [ x] Yes, this task assigned to me.
• [✅ ] My code follows the style guidelines(Clean Code) of this project
• [✅ ] I have performed a self-review of my own code
• [✅ ] My Filename is in camelCase format
• [✅ ] I have added Problem statement, Problem link in file.

[aayushi-droid]

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