Function compare 

pub fn compare(str1: &str, q: &str) -> f64

Compares two strings and returns a score based on the longest common subsequence (LCS) and normalized length comparison.

Arguments

• str1 - A reference to the first string.
• q - A reference to the query string.

Returns

• A floating-point score representing the similarity between str1 and q.

Examples

let score = compare("AGGTAB", "AGGTAB");
assert_eq!(score, 6.0);