c++ - 如何解决此浮点期望：8 错误

Question

该程序假设采用 dict 格式的 json。键是邮政编码，值是租金价格的向量。

当我使用 g++ 运行它时，我得到一个浮点异常 8：错误。据我所知，只有在值溢出其数据类型时才会触发错误，但只有在平均函数的平均变量超过不应发生的 unsigned long long 的最大值时才会发生这种情况。

我也愿意以更优雅的方式编写此代码。

#include <iostream>
#include <fstream>
#include <string>
#include <vector>
#include <nlohmann/json.hpp>

using json = nlohmann::json;
using namespace std;

unsigned int average(unsigned int n1,unsigned int n2){
    unsigned int mean;
    mean = (n1 + n2)/2;
    return mean;
}

unsigned long long average(vector<unsigned int> nValues){
    unsigned long long mean = 0;
    for(auto element : nValues){
        mean += element;
    }
    mean /= nValues.size();
    return mean;
}

unsigned int strCleaner(string str){
    unsigned int na = 0;
    string temp;
    if(str == "N/A"){
        return na;
    }
    for(auto element : str){
        if(element == '$' || element == ',' || element == ' ' || element == '"'){
            continue;
        }
       temp += element;
    }
    cout << temp << endl;
    int newStr = stoi(temp);
    return (unsigned int)newStr;
}

int main(void)
{
    string line;
    ifstream my_json("records_v1.json");
    ifstream zips("zip_set.txt");
    json my_stat;
    json j;
    my_json >> j;
    while(getline(zips,line)){
        vector<unsigned int> summation; 
        auto map = j[line];
        for(auto element: map){
            string element_str = element.dump();
            size_t result = element_str.find("-");
            if(result != string::npos){
                string n1, n2;
                for (int i = 0; i < element_str.size(); i++)
                {
                    if(i < result){
                        n1 += element_str[i];
                    }
                    if(i > result){
                        n2 += element_str[i];
                    }
                }
               auto mean = average(strCleaner(n1),strCleaner(n2));
               summation.push_back(mean);

            }else if(element_str != "N/A"){
                continue;
                
            }else{
                unsigned int cleanedInt = strCleaner(element);
                summation.push_back(cleanedInt);
            }
        }
        auto city_mean = average(summation);
        my_stat[line] = city_mean; 
    
    }
    ofstream f_myrecord("fileZ.json");
    f_myrecord << setw(4) << my_stat << endl;
}

标签： c++jsonnlohmann-jsonlong-longfloating-point-exceptions