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Fixed 0^(0) and 0^(6-6) to return 1

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Calc as defined 0^0 as 1.  However in the past, 0 raised to
an expression that evaluted to zero returned 1.  The result
was that 0^0 was different than 0^(6-6) or even 0^(0).
Now, calc will return 1 for 0^(0) and 0^zero when zero == 0.
This commit is contained in:
Landon Curt Noll
2021-02-03 01:44:17 -08:00
parent 41803b878e
commit 2c72570b8d
3 changed files with 13 additions and 3 deletions
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4
value.c
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@@ -1879,9 +1879,9 @@ powvalue(VALUE *v1, VALUE *v2, VALUE *vres)
*vres = error_value(E_1OVER0);
break;
}
/* 0 ^ non-neg is zero, including 0^0 */
/* 0 ^ non-neg is 1, including 0^0 */
vres->v_type = V_NUM;
vres->v_num = qlink(&_qzero_);
vres->v_num = qlink(&_qone_);
} else if (qisint(real_v2)) {
vres->v_num = qpowi(v1->v_num, real_v2);
} else {