<分区>
我正在尝试创建一个 C++ 程序来读取包含以下内容的文本文件:
ITEMS 8
ABERDEEN 430082 3.2 5.0
GLASGOW 629501 2.0 1.5
PAISLEY 74170 1.0 1.0
MOTHERWELL 30311 3.0 1.0
EDINBURGH 430082 5.0 1.3
FALKIRK 32379 3.1 1.2
LINLTHGOW 13370 3.0 1.5
DUNDEE 154674 3.2 3.1
我的程序因以下错误而崩溃:
程序读取文件的一些内容直到某一点:
我注意到的一件有趣的事情是，我的每个城镇的 X 和 Y 坐标都应该是 double 的，而当我读取文件时，一些 X/Y 是整数或 double (不知道这是怎么发生的)。我将每个城镇作为城镇对象存储在这样的城镇区域中: 这是我从文件中读取的方法:
bool TownReader::readDatafile(char *datafile)
{
ostringstream errorString;
ifstream inDatastream(datafile, ios::in);
if (!inDatastream)
{
errorString << "Can't open file " << datafile << " for reading.";
MessageBoxA(NULL, errorString.str().c_str(), "Error", MB_OK | MB_ICONEXCLAMATION);
return false;
}
cout << "Reading from file: " << datafile << endl;
readUntil(&inDatastream, "ITEMS");
//Read the number of towns...
inDatastream >> numTowns;
//reserve the nesessery memory...
TownPtr = new Town[ numTowns ];
cout << "Number of towns: " << numTowns << endl;
for (int i = 0; i < numTowns; ++i)
{
Town newTown;
char townName[] = "";
double townX = 0.0;
double townY = 0.0;
int townPopulation = 0;
inDatastream >> townName >> townPopulation >> townX >> townY;
cout << "Town name: " << townName << endl;
cout << "Town pop: " << townPopulation << endl;
cout << "Town X: " << townX << endl;
cout << "Town Y: " << townY << endl;
newTown.setName(townName);
newTown.setPopulation(townPopulation);
newTown.setX(townX);
newTown.setY(townX);
TownPtr[i] = newTown;
}
return true;
}
此方法是以下类的一部分:TownReader。这是类的标题:
class TownReader
{
private:
Town *TownPtr;
int numTowns;
public:
TownReader(void);
bool readDatafile(char *filename);
bool writeDatafile(char *filename);
bool readUntil(std::ifstream *inStream, char *target);
Town *getTowns(void);
int getNumTowns(void);
bool writeBlankRecords(char *datafile, int num);
bool writeTownsBinary(char *datafile);
bool readSpecifiedRecord(char *datafile);
bool writeSpecifiedRecord(char *datafile);
};