How to express n raised to the nth power in c++

There are two ways to represent n to the power n in C: use the pow function, such as pow(5, 3) to represent 5 raised to the power 3, and the result is 125. Use operator overloading, such as Power(5) ^ 3 represents 5 raised to the third power, and the same result is 125.

In C, n raised to the nth power represents

C. Two methods are provided to express n raised to the nth power. ：

1. pow function

<code class="cpp">#include <cmath>

double pow(double x, int y);</code>

• x：base
• y：exponent

Example:

<code class="cpp">#include <iostream>
#include <cmath>

int main() {
  double base = 5;
  int exponent = 3;

  double result = pow(base, exponent);

  std::cout << base << " 的 " << exponent << " 次方为 " << result << std::endl;

  return 0;
}</code>

Run result:

<code>5 的 3 次方为 125</code>

2. Operator overloading

You can use operator<< to overload operators and define your own operators to represent exponentiation operations.

Example:

<code class="cpp">#include <iostream>

class Power {
public:
  Power(double base) : base(base) {}

  double operator^(int exponent) {
    return pow(base, exponent);
  }

private:
  double base;
};

int main() {
  Power base(5);

  double result = base ^ 3;

  std::cout << 5 << " 的 " << 3 << " 次方为 " << result << std::endl;

  return 0;
}</code>

Run result:

<code>5 的 3 次方为 125</code>

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