37 lines
572 B
C++
37 lines
572 B
C++
#include <cmath>
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#include <iostream>
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double uexponent(double m, unsigned int n) {
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double ret;
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if (!n)
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return 1;
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if (n == 1)
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return m;
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ret = uexponent(m, n / 2);
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ret *= ret;
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if (n % 2)
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return ret * m;
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else
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return ret;
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}
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double exponent(double m, int n = 2) {
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if (n >= 0)
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return uexponent(m, n);
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return 1 / uexponent(m, std::abs(n));
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}
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int main() {
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double m = 4.1;
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int n = 4;
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std::cout << m << " raised to " << n << ": " << exponent(m, n) << std::endl
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<< "When n is omitted: " << exponent(m) << std::endl;
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}
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