Yes, unfortunately the code example got somewhat mangled as it passed through the arXiv sanitization script [1]. The original is: char str_a[20], str_b[20]

Yes, unfortunately the code example got somewhat mangled as it passed through the arXiv sanitization script [1]. The original is: char str_a[20], str_b[20], str_c[20]; sprintf(str_a, "%f", a); sprintf(str_b, "%f", b); sprintf(str_c, "%f", c); [1] https://github.com/google-research/arxiv-latex-cleaner https://github.com/google-research/arxiv-latex-cleaner