72. Implement Custom strcpy function

In C, the strcpy() function copies a null-terminated string from source to destination.

Your task is to implement a custom version of strcpy() that copies one string into another without using built-in functions.

You will be given:

• A source string src
• A destination buffer dest[101] (you must copy into it)

Ensure the destination is null-terminated, just like standard strcpy.

Example-1

Input: "firmware"
Output: firmware

Example-2

Input: "abc 123"
Output: abc 123

Example-3

Input: ""
Output: ``