scan_scaled
if (scan_scaled(cinput, &result) == 0)
int scan_scaled(char *, long long *);
if (scan_scaled(arg, &val64) == -1) {
r = scan_scaled(optarg + 7, &llv);
if (scan_scaled(arg, &val64) == -1)
r = scan_scaled(optarg + 7, &llv);