通过调用成员函数print_house_details写一个查找中国各省名称和人数的c++程序，其中包含河北省7420万人，河南省9872万人，云南省4693万人，四川省8400万人，江苏省8515万人，山东省10200万人，湖北省5844万人并且运行结果时可以输入省名查找人数

以下是实现上述功能的C++程序：

#include <iostream>
#include <map>
#include <string>

using namespace std;

class Province {
public:
    Province() {}
    Province(const string& name, int population) : name_(name), population_(population) {}

    void print_house_details() const {
        cout << "Province: " << name_ << ", Population: " << population_ << " million" << endl;
    }

    int get_population() const {
        return population_;
    }

private:
    string name_;
    int population_;
};

int main() {
    map<string, Province> provinces;
    provinces["Hebei"] = Province("Hebei", 7420);
    provinces["Henan"] = Province("Henan", 9872);
    provinces["Yunnan"] = Province("Yunnan", 4693);
    provinces["Sichuan"] = Province("Sichuan", 8400);
    provinces["Jiangsu"] = Province("Jiangsu", 8515);
    provinces["Shandong"] = Province("Shandong", 10200);
    provinces["Hubei"] = Province("Hubei", 5844);

    string query;
    cout << "Enter a province name to find its population: ";
    cin >> query;

    if (provinces.count(query) > 0) {
        int population = provinces[query].get_population();
        cout << "Population of " << query << " is " << population << " million" << endl;
    } else {
        cout << "Could not find population for " << query << endl;
    }

    return 0;
}

运行结果示例如下：

Enter a province name to find its population: Shandong
Population of Shandong is 10200 million

你可以输入不同的省名进行测试，程序会输出对应省的人口数量。