用Octave计算不定式极限（7）
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其他不定式（4） \( 0 ^0 \)型
计算\( \displaystyle\lim_{x \to 0^+ } x^x \)
程序代码如下
function [text_result, numeric_result] = func13(x_value)
    pkg load symbolic;
    x = sym('x');
    question = power(x, x);
    lim = limit(question, x, x_value);
    text_result = ["\n", disp(lim)];
    numeric_result = eval(lim);
endfunction
令\(x \to 0^+ \)，计算结果如下
>> [text_result, numeric_result] = func13(eps)
warning: passing floating-point values to sym is dangerous, see "help sym"
warning: called from
    double_to_sym_heuristic at line 50 column 7
    sym at line 384 column 13
    limit at line 92 column 5
    func13 at line 5 column 9

text_result =
     1125899906842611
     ────────────────
     1125899906842624
    2
    ─────────────────
            2

numeric_result = 1.0000
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