我想用C++的一个函数对一个列表进行求和和幂运算

#include <iostream>
#include <vector>
#include <cmath>

// 求和函数
int sum(const std::vector<int>& nums) {
    int result = 0;
    for (int num : nums) {
        result += num;
    }
    return result;
}

// 幂运算函数
std::vector<int> power(const std::vector<int>& nums, int exponent) {
    std::vector<int> result;
    for (int num : nums) {
        result.push_back(pow(num, exponent));
    }
    return result;
}

int main() {
    std::vector<int> nums = {1, 2, 3, 4, 5};

    // 求和
    int sumResult = sum(nums);
    std::cout << "Sum: " << sumResult << std::endl;

    // 幂运算
    int exponent = 2;
    std::vector<int> powerResult = power(nums, exponent);
    std::cout << "Power: ";
    for (int num : powerResult) {
        std::cout << num << " ";
    }
    std::cout << std::endl;

    return 0;
}