I solve an euclidus algorythm, that explain in book of D. Knut. I beginer in c++, and try to understand, what is wrong. T

Question

Give me advice, pls)
https://code.sololearn.com/cKu74XGSu75U/?ref=app

Answer 1

The problem is r. It is set in this line:

if (m < n){r = m; m = n; n = r; r = 1;}

But what happens if m >= n. r will have no value.

Answer 2

No, if m >= n we already found solve. "if" skip by program