C++次方函數(shù)遞歸實(shí)現(xiàn)方法

c++
小樊
85
2024-07-25 16:28:14

下面是一個(gè)C++中計(jì)算冪次的函數(shù)的遞歸實(shí)現(xiàn)方法：

#include <iostream>

double power(double base, int exponent) {
    if (exponent == 0) {
        return 1;
    }
    else if (exponent > 0) {
        return base * power(base, exponent - 1);
    }
    else {
        return 1 / base * power(base, exponent + 1);
    }
}

int main() {
    double base = 2;
    int exponent = 3;
    
    double result = power(base, exponent);
    
    std::cout << base << " raised to the power of " << exponent << " is: " << result << std::endl;
    
    return 0;
}

在這個(gè)例子中，power函數(shù)采用了遞歸的方式計(jì)算冪次。當(dāng)指數(shù)為0時(shí)，返回1；當(dāng)指數(shù)大于0時(shí)，返回基數(shù)乘以power(base, exponent-1)；當(dāng)指數(shù)小于0時(shí)，返回1除以基數(shù)乘以power(base, exponent+1)。然后在main函數(shù)中調(diào)用power函數(shù)來(lái)計(jì)算結(jié)果。

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