vs2022，c++ std::bad_alloc异常怎么修改



```c++
#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <string>
using namespace std;


//结构体
struct City {   //图的顶点
    string country, city;
    float latitude, longitude;//经纬度
};
struct Route {
    string start_city, end_city, transport, other_info;//起点，终点，交通工具，其他信息
    float time, cost;//时间，花费
};
struct Arc {
    float adjvex;//权值
    Route* info;//弧信息
};
struct Graph {
    Arc arcs[199][199];//二维数组
    City vexs[199];//顶点数据信息
    int vexnum, arcnum;//顶点数和弧数
};


void test() {
    
    
}


int main()
{
    //读取 cities 表
    FILE* fp;
    fp = fopen("C:\\Users\\张宇航\\Desktop\\集中实习\\cities.csv", "r");
    if (!fp) {
        printf("ERROR!!!");
        exit(0);
    }
    City city[199];
    char ch;
    float f;
    int i = 0, j = 0;

    while (!feof(fp))
    {
        //存储国家名
        ch = fgetc(fp);
        for (; ch != ','; ch = fgetc(fp))
        {
            city[i].country += ch;
        }

        //存储城市名
        ch = fgetc(fp);
        for (; ch != ','; ch = fgetc(fp))
        {
            city[i].city += ch;
        }

        //存储经纬度
        fscanf(fp, "%f,", &f);
        city[i].latitude = f;
        fscanf(fp, "%f\n", &f);
        city[i].longitude = f;
        i++;
    }
    fclose(fp);

    //读取 routes 表
    FILE* fp1;
    fp1 = fopen("C:\\Users\\张宇航\\Desktop\\集中实习\\routes.csv", "r");
    if (!fp1) {
        printf("ERROR!!!");
        exit(0);
    }
    Route route[1975];
    i = 0;

    while (!feof(fp1))
    {
        //存储起点城市
        ch = fgetc(fp1);
        for (; ch != ','; ch = fgetc(fp1))
        {
            route[i].start_city += ch;
        }

        //存储终点城市
        ch = fgetc(fp1);
        for (; ch != ','; ch = fgetc(fp1))
        {
            route[i].end_city += ch;
        }

        //存储交通工具
        ch = fgetc(fp1);
        for (; ch != ','; ch = fgetc(fp1))
        {
            route[i].transport += ch;
        }

        //存储时间和花费
        fscanf(fp1, "%f,", &route[i].time);
        fscanf(fp1, "%f,", &route[i].cost);

        //存储其他信息
        ch = fgetc(fp1);
        for (; ch != '\n'; ch = fgetc(fp1))
        {
            route[i].other_info += ch;
        }
        i++;
    }
    
    return 0;
}





0x00007FF87FBCFDEC 处(位于 第一次实习.exe 中)引发的异常: Microsoft C++ 异常: std::bad_alloc，位于内存位置 0x000000D2F1AA91B0 处。
0x00007FF87FBCFDEC 处(位于 第一次实习.exe 中)有未经处理的异常: Microsoft C++ 异常: std::bad_alloc，位于内存位置 0x000000D2F1AA91B0 处。