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338 B

9 years ago
#include "scan.h"
unsigned int scan_ulong(register char *s,register unsigned long *u)
{
register unsigned int pos; register unsigned long result;
register unsigned long c;
pos = 0; result = 0;
while ((c = (unsigned long) (unsigned char) (s[pos] - '0')) < 10)
{ result = result * 10 + c; ++pos; }
*u = result; return pos;
}