C++实现数据文件存储与加载

本文实例为大家分享了C++实现数据文件存储与加载的具体代码，供大家参考，具体内容如下

首先请先确认已经安装好了opencv3及以上版本。

#include <opencv2/opencv.hpp>
#include <iostream>
#include <string>
using namespace cv;
using namespace std;

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;
}

演示结果

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