/* ** ISISBN.C - Validate International Standard Book Numbers (ISBNs) ** ** public domain by Maynard Hogg */ #include int isbn2(char *str) { int i = 0; int test = 0; int c; while ('\0' != (c = *str++)) { if (isdigit(c)) c -= '0'; else if (i == 9 && 'X' == c) c = 10; else continue; test += c * ++i; } return (i == 10 && test % 11 == 0); } git Git repository'/>

path: root/net/decnet/TODO

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