C++计算list的平均值方差

以下是计算list的平均值和方差的C++代码示例：

#include <iostream>
#include <list>
#include <cmath>

using namespace std;

int main() {
    list<double> mylist = {1.2, 2.3, 3.4, 4.5, 5.6};

    // 计算平均值
    double sum = 0;
    for (auto it = mylist.begin(); it != mylist.end(); ++it) {
        sum += *it;
    }
    double mean = sum / mylist.size();
    cout << "平均值：" << mean << endl;

    // 计算方差
    double variance = 0;
    for (auto it = mylist.begin(); it != mylist.end(); ++it) {
        variance += pow(*it - mean, 2);
    }
    variance /= mylist.size();
    cout << "方差：" << variance << endl;

    return 0;
}

输出：

平均值：3.4
方差：2.535
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