Changing Disk File Name Failed
This is my C++ homework for college...
My problem is when I use "change" the disk file doesn`t really change its name and I don`t know how to fix.
Anyone has any ideas? Thank you.
DUE TO THE LENGTH LIMIT, HERE IS THE FIRST PART OF MY CODE
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#include <iomanip>
#include <iostream>
#include <fstream>
#include <vector>
#include <string>
#include <cctype>
using namespace std;
class WeatherStation
{
string StationDesignation;
double Temperature;
double AirQualityIndex;
double PollenCount;
public:
WeatherStation();
void SetDesignation(string ID) { StationDesignation = ID; }
void SetTemperature(double Degree) { Temperature = Degree; }
void SetPollenCount(double MeasuredCount) { PollenCount = MeasuredCount; }
void SetAQScore(double MeasuredIndex) { AirQualityIndex = MeasuredIndex; }
string GetDesignation() { return StationDesignation; }
double GetTemperature() { return Temperature; }
double GetPollenCount() { return PollenCount; }
double GetAQScore() { return AirQualityIndex; }
};
WeatherStation::WeatherStation()
{
StationDesignation = "";
Temperature = 0.0;
AirQualityIndex = 0.0;
PollenCount = 0.0;
}
class WeatherStationList
{
vector<WeatherStation> List;
string FileName;
public:
WeatherStationList() { FileName = "DEFAULT"; }
void AddWeatherStation();
void Input();
void HighLow();
void Daily();
void Pollen();
void Quality();
void SaveWeatherStationInfo();
void ReadWeatherStationInfo();
void ChangeFileName(string File) { FileName = File; }
void GetFileName();
string ShowFileName() { return FileName; }
};
void WeatherStationList::AddWeatherStation()
{
string ID = "";
WeatherStation Loc;
cout << "Enter Stations Designation Below, Stop To Quit." << endl;
while (ID != "stop")
{
cout << "Station Location: ";
getline(cin, ID);
int CommandLength = ID.size();
for (int i = 0 ; i < (int)CommandLength ; i++)
ID[i] = tolower(ID[i]);
if(ID != "stop")
{
Loc.SetDesignation(ID);
List.push_back(Loc);
}
}
}
void WeatherStationList::Input()
{
double Temp, Pol, Qua;
for(int i = 0 ; i < (int)List.size() ; ++i)
{
cout << "\nWeather Station: " << List[i].GetDesignation() << endl;
cout << "Temperature: ";
cin >> Temp;
List[i].SetTemperature(Temp);
cout << "Pollen Count: ";
cin >> Pol;
List[i].SetPollenCount(Pol);
cout << "Air Quality: ";
cin >> Qua;
List[i].SetAQScore(Qua);
}
cout << endl;
cin.ignore(100, '\n');
}
void WeatherStationList::HighLow()
{
int i;
double low = List[0].GetTemperature();
for(i = 1 ; i < (int)List.size() ; ++i)
low = List[i].GetTemperature() > low ? low:List[i].GetTemperature();
double high = List[0].GetTemperature();
for(i = 1 ; i < (int)List.size() ; ++i)
high = List[i].GetTemperature() < high ? high : List[i].GetTemperature();
cout << "\n\n===============================Temperature Report=============================="<<endl
<< "\n\t\t\tFahrenheit\tCelsius" << endl
<< "-------------------------------------------------------------------------------"
<< setprecision(4)
<< "\nLowest Temperature =\t\t" << low << "\t" << (low-32)*5/9 << endl
<< "-------------------------------------------------------------------------------"
<< "\nHighest Temperature =\t\t" << high << "\t" << (high-32)*5/9 << endl << endl
<< "-------------------------------------------------------------------------------\n\n";
}
void WeatherStationList::Daily()
{
int i;
double sum = 0, mean = 0;
for (i = 0 ; i < (int)List.size() ; ++i) sum += List[i].GetTemperature();
mean = sum/List.size();
cout << "\n\n===============================Temperature Report=============================="
<< "\n\n\t\t\tFahrenheit\tCelsius" << endl
<< "-------------------------------------------------------------------------------"
<< setprecision(4)
<< "\nMean Temperature =\t" << mean << "\t\t" << (mean-32)*5/9 << endl
<< "-------------------------------------------------------------------------------\n"
<< "Raw Data:\n\n";
for (i = 0 ; i < (int)List.size() ; ++i)
cout << List[i].GetDesignation() << "\t\t" << List[i].GetTemperature() << "\t\t" << (List[i].GetTemperature()-32)*5/9<<endl;
cout << "-------------------------------------------------------------------------------\n\n\n";
}
void WeatherStationList::Pollen()
{
int i;
for (i = 0 ; i < (int)List.size() ; ++i)
cout << List[i].GetDesignation() << "\t\t" << List[i].GetPollenCount() << endl;
cout << "-------------------------------------------------------------------------------\n\n\n";
}
void WeatherStationList::Quality()
{
int i;
for (i = 0 ; i < (int)List.size() ; ++i)
cout << List[i].GetDesignation() << "\t\t" << List[i].GetAQScore() << endl;
cout << "-------------------------------------------------------------------------------\n\n\n";
}
void WeatherStationList::SaveWeatherStationInfo()
{
int i;
fstream OutFile(FileName.c_str(), ios::out);
cout << "Saving to file..." << endl;
for(i = 0 ; i < (int)List.size() ; i++) {
OutFile << List[i].GetDesignation() << endl;
OutFile << List[i].GetTemperature() << endl;
OutFile << List[i].GetPollenCount() << endl;
OutFile << List[i].GetAQScore() << endl;
}
OutFile.close();
}
void WeatherStationList::ReadWeatherStationInfo()
{
fstream InFile(FileName.c_str(), ios::in);
cout << "Loading from file..." << endl;
WeatherStation Loc;
string StationDesignation;
double Temperature;
double PollenCount;
double AirQualityIndex;
while(!InFile.eof()) {
InFile >> StationDesignation;
InFile.ignore(100, '\n');
if(!InFile.eof()) {
InFile >> Temperature;
InFile >> PollenCount;
InFile >> AirQualityIndex;
Loc.SetDesignation(StationDesignation);
Loc.SetTemperature(Temperature);
Loc.SetPollenCount(PollenCount);
Loc.SetAQScore(AirQualityIndex);
List.push_back(Loc);
}
}
InFile.close();
}
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Last edited on
AND HERE IS THE SECOND PART
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class WeatherStationUI
{
WeatherStationList List;
public:
WeatherStationUI() { RunCommand(); }
void RunCommand();
void Menu();
void GetFileName();
void ChangeFileName();
};
void WeatherStationUI::RunCommand()
{
int i = 0;
string Command = "";
while (Command != "quit")
{
Menu();
cout << "Command: ";
getline (cin, Command);
int CommandLength = Command.size();
for (i = 0 ; i < (int)CommandLength ; i++)
Command[i] = tolower(Command[i]);
if (Command == "add")
List.AddWeatherStation();
if (Command == "post")
List.Input();
else if (Command == "highlow")
List.HighLow();
else if (Command == "daily")
List.Daily();
else if (Command == "pollen")
List.Pollen();
else if (Command == "quality")
List.Quality();
else if (Command == "save")
List.SaveWeatherStationInfo();
else if (Command == "load")
List.ReadWeatherStationInfo();
else if (Command == "show")
GetFileName();
else if (Command == "change")
ChangeFileName();
}
}
void WeatherStationUI::Menu()
{
cout << "Choices........................................................................" << endl
<< "-------------------------------------------------------------------------------"<<endl
<< "\tAdd.......puts an new WeatherStation object onto the list." << endl
<< "\tPost......allows the user to post values." << endl
<< "\tHighLow...displays the report of high and low temperatures." << endl
<< "\tDaily.....displays the daily report." << endl
<< "\tPollen....displays the daily pollen count." << endl
<< "\tQuality...displays the daily air quality report." << endl
<< "\tSave......copies the contents of the list to a disk file." << endl
<< "\tRead......copies the contents of a disk file to the vector." << endl
<< "\tQuit......exits the program." << endl
<< "\tShow......shows the name of the current data file." << endl
<< "\tChange....changes the name of the current data file." << endl
<< "-------------------------------------------------------------------------------\n";
}
void WeatherStationUI::GetFileName()
{
WeatherStationList List;
cout << "-------------------------------------------------------------------------------" << endl;
cout << "Current File Name: " << List.ShowFileName() << endl;
cout << "-------------------------------------------------------------------------------" << endl;
}
void WeatherStationUI::ChangeFileName()
{
string NewFile;
WeatherStationList List;
cout << "-------------------------------------------------------------------------------" << endl;
cout << "Current File Name: " << List.ShowFileName() << endl;
cout << "New File Name: ";
getline(cin, NewFile);
List.ChangeFileName(NewFile);
cout << "-------------------------------------------------------------------------------" << endl;
}
int main()
{
WeatherStationUI List;
}
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ChangeFileName() just changes what file you are writing to, not any files actually on the disk.
But my teacher`s example shows exactly like that just without the problem... it`s supposed to change the name of the "File" I saved in the folder
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