?? gf2.cpp
字號:
#include <NTL/GF2.h>
#include <NTL/new.h>
NTL_START_IMPL
void div(GF2& x, GF2 a, GF2 b)
{
if (b == 0) Error("GF2: division by zero");
x = a;
}
void div(GF2& x, long a, GF2 b)
{
if (b == 0) Error("GF2: division by zero");
x = a;
}
void div(GF2& x, GF2 a, long b)
{
if ((b & 1) == 0) Error("GF2: division by zero");
x = a;
}
void inv(GF2& x, GF2 a)
{
if (a == 0) Error("GF2: division by zero");
x = a;
}
void power(GF2& x, GF2 a, long e)
{
if (e == 0) {
x = 1;
return;
}
if (e < 0 && a == 0)
Error("GF2: division by zero");
x = a;
}
ostream& operator<<(ostream& s, GF2 a)
{
if (a == 0)
s << "0";
else
s << "1";
return s;
}
istream& operator>>(istream& s, GF2& x)
{
static ZZ a;
s >> a;
conv(x, a);
return s;
}
NTL_END_IMPL
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