?? gf2.c
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#include <NTL/GF2.h>#include <NTL/new.h>NTL_START_IMPLvoid 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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