76. Convert Uppercase Letters to Lowercase

You are given a null-terminated string of up to 100 characters. Your task is to:

• Convert all uppercase letters (A–Z) to lowercase (a–z)
• Leave all other characters unchanged (lowercase, digits, symbols, spaces)
• Perform the conversion in-place, using only basic character logic
• Do not use standard functions like tolower()
   

Example-1

Input: "Hello Embedded"
Output: hello embedded

Example-2

Input: "C99 IS POWERFUL!"
Output: c99 is powerful!

Example-3

Input: "test123"
Output: test123