char *strstr(register char *buf, register char *sub)
{
register char *bp;
if (!*sub) return buf;
for (;;)
{
if (!*buf) break;
bp = buf;
for (;;)
{
if (!*sub) return buf;
if (*bp++ != *sub++) break;
}
sub -= (unsigned long) bp;
sub += (unsigned long) buf;
buf += 1;
}
return 0;
}
责任编辑：cyth
