C++ csv文件读写

 // 写文件  
	ofstream outFile;
	outFile.open("data.csv", ios::out); // 打开模式可省略
	for(int j=0;j<TotalLength;j++)
	{
		for (int i = 0; i < 4; i++)
		{
			outFile << ReadEEGALL[i][j] << ",";
		}
		outFile << std::endl;
	}
	outFile.close();

// 读文件   需要#include vector #include string  #include <iostream> #include <sstream>
 
ifstream inFile("data.csv", ios::in);  
string lineStr;  
vector<vector<string>> strArray;  
while (getline(inFile, lineStr))  
{  
    // 打印整行字符串  
    cout << lineStr << endl;  
    // 存成二维表结构  
    stringstream ss(lineStr);  
    string str;  
    vector<string> lineArray;  
    // 按照逗号分隔  
    while (getline(ss, str, ','))  
        lineArray.push_back(str);  
    strArray.push_back(lineArray);  
}  
  
getchar();  
return 0;