c++ - 将文本文件读入 C++ 值，由不同的字符分隔

Question

我有一个包含一些数据的文本文件，我正在尝试将其读入我的对象。

这是一种相当简单的格式，由一个文件名、一对维度值和一个值对列表组成:

StringFileName
IntWidth IntHeight
IntA:IntB IntA:IntB IntA:IntB
IntA:IntB IntA:IntB IntA:IntB
IntA:IntB IntA:IntB IntA:IntB

例如:

MyFile.txt
3 3
1:2 3:4 4:5
9:2 1:5 2:1
1:5 8:3 4:2
There may be more unrelated text here

这是我目前所拥有的:

void OnLoad(char* InputFilename) {
    string Filename;
    int Width;
    int Height;

    // open the file
    ifstream inputFile(InputFilename);

    // get the filename
    getline(inputFile, Filename);
    cout << "Filename is " << Filename << endl;

    // get the width and height
    string dataLine;
    getline(inputFile, dataLine);
    stringstream ss(dataLine);
    ss >> Width;
    ss >> Height;
    cout << "Dimensions are " << Width << "x" << Height << endl;

    // get the lines of tile-data
    for (int Y = 0; Y < Height; Y++) {
        /*
         * Here is where I'm getting stuck.
         * I have a string of "i:i i:i i:i" values, and I get a series of strings 
         * of "i:i" values, but can't work out the neatest way of splitting it out.
         */
        getline(inputFile, dataLine);
        stringstream row(dataLine);
        for (int X = 0; X < Width; X++) {
            int IntA;
            int IntB;
            // ?
            DoStuffWith(IntA, IntB);
        }

   }
}

Answer 1

像这样的东西应该可以工作

std::ifstream file("filename");
std::string file_name;
int height, width;
file >> file_name >> height >> width;
// i don't know what your format is but it isn't very importance
std::deque<std::pair<int, int> > pairs;
std::string line;
int i, j;
char a;
while(std::cin >> i >> a >> j)  //here i j are values in your pair.
{
     if(a!=':') break;
     pairs.push_back(std::make_pair(i, j));
}