用"*“表示C++中的相对频率打印直方图

#include <iostream>
#include <vector>

void printHistogram(const std::vector<int>& data) {
    const int numBins = 10; // 直方图的分组数
    const int binWidth = data.size() / numBins; // 每个分组的宽度

    std::vector<int> frequencies(numBins, 0); // 统计频率的数组

    // 统计频率
    for (int i = 0; i < data.size(); ++i) {
        int binIndex = data[i] / binWidth;
        ++frequencies[binIndex];
    }

    // 计算相对频率并绘制直方图
    for (int i = 0; i < frequencies.size(); ++i) {
        double relativeFrequency = static_cast<double>(frequencies[i]) / data.size();
        int numStars = relativeFrequency * 50; // 星号的数量，可根据需要调整

        std::cout << "[" << (i * binWidth) << " - " << ((i + 1) * binWidth) << "]: ";

        for (int j = 0; j < numStars; ++j) {
            std::cout << "*";
        }

        std::cout << std::endl;
    }
}

int main() {
    std::vector<int> data = {10, 20, 30, 40, 50, 60, 70, 80, 90, 100};

    printHistogram(data);

    return 0;
}