如何从文本文件中读取值和数组

Question

我知道如何用ifstream等读取文件.我只是坚持这个任务,我有一个充满常量的头文件和一个包含3个变量的文本文件(预算,hotelType,[event1,event2,...,eventn]).

#ifndef CONSTANTS_H_
#define CONSTANTS_H_


const string nameMap[] = { "Opening", "Soccer 1", "Soccer 2", "Soccer 3",
        "Track and Field 1", "Track and Field 2", "Track and Field 3",
        "Track and Field 4", "Swimming 1", "Swimming 2", "Gymnastics 1",
        "Gymnastics 2", "Basketball 1", "Basketball 2", "Closing" };
const int eventPriceMap[] = { 2000, 80, 160, 500, 80, 100, 120, 140, 100, 100, 60, 100,
        150, 300, 800 };

const int eventDateMap[] = { 0, 3, 6, 9, 1, 2, 3, 4, 5, 6, 7, 8, 5, 7, 9 };

const int eventQuota[] = {60, 47, 30, 22, 50, 52, 42, 25, 37, 20, 43, 34, 35, 30, 40};

const int hotelPriceMap[] = {160, 210, 320};

const int hotelQuota[] ={20, 25, 30};// per day

const int MAXEVENTS = 10;

const int MAXREQUESTS = 150;

const int NUMBEROFEVENTS = 15;

const int NUMBEROFDAYS = 10;

#endif /* CONSTANTS_H_ */

9020,4[2,0,5,14,10,4,3,13,1]
7805,5[13,3,12,12,0,9,7,10,6,1]
7075,5[3,2,4,9,7,0,1,5,6,14]
7679,4[0,4,14,1,3,12,5,10]
6356,3[7,3]
6874,5[14,0,4,10,9,3]
4715,4[9]
4784,5[11]
4321,3[5,3,8,9]
6469,5[7,6,6,14,12,5,2]
4838,4[1,2]
4103,3[14]
5904,5[5,4,6]
5775,3[10,14,14,8,7,3,4]
7070,4[1,4,6,11,13,3,2,5,14]
4605,3[6,10,1,8,7,3,3]
7484,4[11,5,14,2,6,7,8,1,0]

在另一个文件中,我将如何阅读此文本文档并将其保存到Budget,hotelType和[events]中.我绝对不知道我还在学习c ++,感谢任何帮助过的人!

编辑:我不认为常量头文件是必要的.我很抱歉

Answer 1

如果我正确理解你的问题，这里有一个解决方案来解决你的问题。根据您的文件，您需要三个变量：

1. 预算，是一维数组
2. hotelType，也是一维数组
3. 事件，可以是二维数组

因此，基于此，解决方案可能是：

budget[]  = {9020,7805,7075,7679,6356,6874,4715 ...}
hotelType[] = {4,5,5,4,3,5 ...}
events[][] = {{2,0,5,14,10,4,},{13,3,12,12,0,9,7,10,6,1},{3,2,4,9,7,0,1,14} ...}

让我知道我是否走在正确的轨道上，以便我们可以继续实施......

编辑

第一个解决方案，使用数组：

#include <iostream>
#include <string>
#include <fstream>

int main()
{
   std::ifstream infile("file.txt");
   std::string line;
   int budget[100], hotelType[100], events[100][100], index = 0;
   while (std::getline(infile, line)){
       std::string num;
       int i = 0;
       for( ; i < line.length(); i++){
            if(line[i] != ',' && line[i] != '[' && line[i] != ']')
                num += line[i];
            else{
                budget[index] = std::stoi(num);
                num = "";
                break;
            }
       }
       i++;
       hotelType[index] = std::stoi(line.substr(i, 1));
       i++; i++;
       for(int j = 0; i < line.length(); i++){
            if(line[i] != ',' && line[i] != '[' && line[i] != ']')
                num += line[i];
            else{
                events[index][j] = std::stoi(num);
                num = "";
                j++;
            }
       }
       index++;
   }
   for(int i = 0; i < index; i++){
       std::cout<< i + 1 << "th: ";
       std::cout<< "\tBudget    : " << budget[i] << std::endl;
       std::cout<< "\tHotel Type: " << hotelType[i] << std::endl;
       std::cout<< "\tEvents    : " << std::endl;
       for(int j = 0; j < 5; j++)
           std::cout<< "\t\t" << events[i][j] << std::endl;
   }
   return 0;
}