C++ 讀寫 CSV檔

在C++ 中讀寫 CSV的辦法

細節就看看 source code吧

	#include <iostream>
	#include <string>
	#include <fstream>
	#include <sstream>
	int main()
	{
	vector<double> matrix;
	//readfile
	fstream file;
	file.open("read.csv");
	string line
	while (getline( file, line,'\n')) //讀檔讀到跳行字元
	{
	istringstream templine(line); // string 轉換成 stream
	string data;
	while (getline( templine, data,',')) //讀檔讀到逗號
	{
	matrix.push_back(atof(data.c_str())); //string 轉換成數字
	}
	}
	file.close();
	//writefile
	file.open("write.csv");
	for (int i=0;i<matrix.size();i++)
	{
	file << matrix[i]<<",";
	}
	file.close();
	return 0;
	}

view raw gistfile1.txt hosted with ❤ by GitHub