C++ 文本txt数据读写

基础算法积累，不是什么难题，只是为了以后快速粘贴复制，也共大家提高效率。

这个是读取txt 文本数据用的，稍加改造即可使用。天下文章一大抄，就看你能超出什么效果，这里不再感谢代码的原始出处，如果原始作者看到。请你放开胸怀，就算帮助大家，提供方便了！

void readInToMatrix(fstream &in, string FilePath, double data[ROW][COLUMN]) {
	in.open(FilePath, ios::in);//打开一个file
	if (!in.is_open()) {
		cout << "Can not find " << FilePath << endl;
		system("pause");
	}
	string buff;
	int i = 0;//行数i
	while (getline(in, buff)) {
		vector<double> nums;
		// string->char *
		char *s_input = (char *)buff.c_str();
		const char * split = ",";
		// 以‘，’为分隔符拆分字符串
		char *p = strtok(s_input, split);
		double a;
		while (p != NULL) {
			// char * -> int
			a = atof(p);
			//cout << a << endl;
			nums.push_back(a);
			p = strtok(NULL, split);
		}//end while
		for (int b = 0; b < nums.size(); b++) {
			data[i][b] = nums[b];
			//std::cout<<nums[b]<<" , ";
		}//end for
		//std::cout<<endl;
		i++;
	}//end while
	in.close();
	cout << "get  data over" << endl;
}

没有main()怎么形？

#include <iostream>  
#include <opencv2/core/core.hpp>  
#include <opencv2/highgui/highgui.hpp>  
#include <opencv2/ml/ml.hpp>  

#include <cstdlib>
#include <ctime>
#include<stdio.h>
#include<stdlib.h>
#include<math.h>
#include <fstream>

#include <vector>
#include <cassert>
#include <string>
#include <sstream>

using namespace cv;  
using namespace std;  
  #ifdef _DEBUG
#pragma comment(lib,"opencv_core2413d.lib")
#pragma comment(lib,"opencv_highgui2413d.lib")
#pragma comment(lib,"opencv_imgproc2413d.lib")
#pragma comment(lib,"opencv_features2d2413d.lib")
#pragma comment(lib,"opencv_calib3d2413d.lib")
#pragma comment(lib,"opencv_legacy2413d.lib")

#pragma comment(lib,"opencv_stitching2413d.lib")
#pragma comment(lib,"opencv_photo2413d.lib")
#pragma comment(lib,"opencv_contrib2413d.lib")
#pragma comment(lib,"opencv_flann2413d.lib")
#pragma comment(lib,"opencv_gpu2413d.lib")
#pragma comment(lib,"opencv_ml2413d.lib")


#pragma comment(lib,"opencv_nonfree2413d.lib")
#pragma comment(lib,"opencv_objdetect2413d.lib")
#pragma comment(lib,"opencv_ocl2413d.lib")
#pragma comment(lib,"opencv_superres2413d.lib")
#pragma comment(lib,"opencv_ts2413d.lib")
#pragma comment(lib,"opencv_video2413d.lib")

#pragma comment(lib,"opencv_videostab2413d.lib")
#else
#pragma comment(lib,"opencv_core2413.lib")
#pragma comment(lib,"opencv_highgui2413.lib")
#pragma comment(lib,"opencv_imgproc2413.lib")
#pragma comment(lib,"opencv_features2d2413.lib")
#pragma comment(lib,"opencv_calib3d2413.lib")
#pragma comment(lib,"opencv_legacy2413.lib")

#pragma comment(lib,"opencv_stitching2413.lib")
#pragma comment(lib,"opencv_photo2413.lib")
#pragma comment(lib,"opencv_contrib2413.lib")
#pragma comment(lib,"opencv_flann2413.lib")
#pragma comment(lib,"opencv_gpu2413.lib")
#pragma comment(lib,"opencv_ml2413.lib")


#pragma comment(lib,"opencv_nonfree2413.lib")
#pragma comment(lib,"opencv_objdetect2413.lib")
#pragma comment(lib,"opencv_ocl2413.lib")
#pragma comment(lib,"opencv_superres2413.lib")
#pragma comment(lib,"opencv_ts2413.lib")
#pragma comment(lib,"opencv_video2413.lib")

#pragma comment(lib,"opencv_videostab2413.lib")

#endif //_debug
#define ROW   1152
#define COLUMN  8

string mtrain_txt="alldl-save.txt";
ofstream myfileall(mtrain_txt, ios::app);

int main()
{
	double data[ROW][COLUMN];
	fstream  mfin;
	string txtfilepath="dataXYZ-0829.txt";
	readInToMatrix(mfin,txtfilepath,data);
 //显示定位效果
	 Mat picture(500,500,CV_8UC3,Scalar(255,255,255));  
	Point drawcenter = Point(250,250);  
	Point drawcenterSec = Point(250,250);  

	bool iscaulate=false;

	while(true)
	{
	
	//wait for 40 milliseconds
		int c = cvWaitKey(40);
		//exit the loop if user press "Esc" key  (ASCII value of "Esc" is 27) 
		if (27 == char(c)) break;
		
	int drawr = 2;  
		//承载图像  
		
	int color=255;
		 line(picture, Point(0,150), Point(500, 150), Scalar(0, 255, 0), 1, 8);
		 line(picture, Point(0,200), Point(500, 200), Scalar(0, 255, 0), 1, 8);
		 line(picture, Point(0,250), Point(500, 250), Scalar(0, 255, 0), 1, 8);
		 line(picture, Point(0,300), Point(500, 300), Scalar(0, 255, 0), 1, 8);
		 line(picture, Point(0,350), Point(500, 350), Scalar(0, 255, 0), 1, 8);


		line(picture, Point(150, 0), Point(150, 500), Scalar(255,0 , 0), 1, 8);
		line(picture, Point(200, 0), Point(200, 500), Scalar(255,0 , 0), 1, 8);
		line(picture, Point(250, 0), Point(250, 500), Scalar(255,0 , 0), 1, 8);
		line(picture, Point(300, 0), Point(300, 500), Scalar(255,0 , 0), 1, 8);
		line(picture, Point(350, 0), Point(350, 500), Scalar(255,0 , 0), 1, 8);

		
		if(!iscaulate)
		{
	for(int i=0;i<ROW;i++)
	{
		


	myfileall << data[i][0]<<","<<data[i][1]<<","<<data[i][2]<<","<<data[i][3]<<data[i][4]<<","<<data[i][5]<<","<<data[i][6]<<","<<data[i][7]<<"\t\n" ;

	drawcenter.x=250-(data[i][0])/5;
		
	drawcenter.y=250+data[i][1]/5;
	
	drawcenterSec.x=250-data[i][4]/5;
		
	drawcenterSec.y=250+data[i][5]/5;

		//参数为：承载的图像、圆心、半径、颜色、粗细、线型  
	circle(picture,drawcenterSec,drawr,Scalar(0,0,color));  

		//参数为：承载的图像、圆心、半径、颜色、粗细、线型  
	circle(picture,drawcenter,drawr,Scalar(0,color,0)); 
	
	}
			iscaulate=true;
		}
	
		imshow("Location_Show",picture);  

	}

	 myfileall.close();
	
	return 0;
}

写的不好，大家凑合着参考！

C++ 文本txt数据读写

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