C++中怎么存储数据文件

C++中怎么存储数据文件，相信很多没有经验的人对此束手无策，为此本文总结了问题出现的原因和解决方法，通过这篇文章希望你能解决这个问题。

存储

then

int main(){//创造一些要存的数据先 string words = "hello, my guys!"; float n = 3.1415926; Mat m = Mat::eye(3, 3, CV_32F); //开始创建存储器 FileStorage save("data.yml", FileStorage::WRITE);// 你也可以使用xml格式 save << "words" << words; save << "number" << n; save << "matrix" << m; save.release(); //存储完毕 cout << "finish storing" << endl;

加载

//加载数据，类似Python字典的用法,创建加载器 FileStorage load("data.yml", FileStorage::READ);  float nn; Mat mm; string ww; load["words"] >> ww; load["number"] >> nn; load["matrix"] >> mm; cout<< ww << endl << nn << endl << mm; cout << endl << "That's the end"; load.release();  return 0;}

完整代码

#include <opencv2/opencv.hpp>#include <iostream>#include <string>using namespace cv;using namespace std;int main(){ string words = "hello, my guys!"; float n = 3.1415926; Mat m = Mat::eye(3, 3, CV_32F); FileStorage save("data.yml", FileStorage::WRITE); save << "words" << words; save << "number" << n; save << "matrix" << m; save.release(); cout << "finish storing" << endl; FileStorage load("data.yml", FileStorage::READ); float nn; Mat mm; string ww; load["words"] >> ww; load["number"] >> nn; load["matrix"] >> mm; cout<< ww << endl << nn << endl << mm; cout << endl << "That's the end"; load.release(); return 0;}

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