C lit une ligne de document par lecture de ligne, séparés par des virgules, des espaces avant et après le retrait, la chaîne de transfert double, et ensuite stocké dans les deux illustrations

fragment de fichier dpt:

41.38674,0.24518
40.42426,0.25005
39.46177,0.26990
38.49929,0.29840
37.53681,0.32108
36.57433,0.31796
35.61185,0.27035
34.64936,0.16700
33.68688,0.01392
32.72440,-0.12851
31.76192,-0.12658
30.79943,0.02354
29.83695,0.17565

DataProc.h

#pragma once
#include <vector>
using namespace std;
class CDataProc
{
public:
	CDataProc();
	~CDataProc();
public:
	bool readDptFile(const char* In_FilePath, vector<double> &In_X,vector<double> &In_Y);// 从指定dpt文件读取数据
public:
	// 去除尾部空格
	char *rtrim(char *str);
	// 去除头部空格
	char *ltrim(char *str);
	// 去除首尾空格
	char *trim(char *str);
};

 

 DataProc.cpp

#include "stdafx.h"
#include "DataProc.h"
#include <stdio.h>
#include <stdlib.h>
#include <io.h>
#include <string.h>
#include <ctype.h>
#pragma warning(disable:4996)

CDataProc::CDataProc()
{
}


CDataProc::~CDataProc()
{
}

// 从指定dpt文件读取数据,读取成功返回true，读取失败返回false
bool CDataProc::readDptFile(const char* In_FilePath, vector<double> &In_X, vector<double> &In_Y)
{
	if (In_FilePath == nullptr) {
		printf("文件路径为空!\n");
		return false;
	}
	// 判断文件是否存在
	if (_access(In_FilePath, 0) == -1) {
		printf("文件不存在!\n");
	}

	In_X.clear();
	In_Y.clear();
	// 读取文件内容
	FILE *fp;
	char strLine[256] = {0};
	if ((fp = fopen(In_FilePath, "r")) == nullptr) {
		printf("fopen error!");
		return false;
	}
	// 读取每一行
	while (!feof(fp)) {
		memset(strLine, 0, 256);
		fgets(strLine, 256, fp);// 读取每一行,带有\n,替换成\0
		if (strlen(strLine) > 0)
		{
			strLine[strlen(strLine) - 1] = '\0';// 带有\n, 替换成\0
			printf("%s\n", strLine);// 输出每一行
			// 获取逗号分隔数据
			char *p = strtok(strLine, ",");
			vector<string> strDataArray;
			while (p != nullptr) {
				strDataArray.push_back(string(p));
				p = strtok(NULL, ",");
			}
			// 前后去除空格
			if (strDataArray.size() != 2) {		
				continue;
			}
			string str1 = trim(const_cast<char*>(strDataArray[0].c_str()));
			string str2 = trim(const_cast<char*>(strDataArray[1].c_str()));
			// 转换成double，存入数组中
			double d1, d2;
			d1 = atof(str1.c_str());
			d2 = atof(str2.c_str());
			In_X.push_back(d1);
			In_Y.push_back(d2);
		}
		
	}
	fclose(fp);

	printf("In_X's size is:%d\n", In_X.size());
	return true;
}

// 去除尾部空格
char * CDataProc::rtrim(char *str)
{
	if (str == NULL || *str == '\0')
	{
		return str;
	}
	
	int len = strlen(str);
	char *p = str + len - 1;
	while (p >= str && isspace(*p)) 
	{
		*p = '\0';
		--p;
	}
	return str;
}

// 去除头部空格
char * CDataProc::ltrim(char *str)
{
	if (str == NULL || *str == '\0')
	{
		return str;
	}
	int len = 0;
	char *p = str;
	while (*p != '\0' && isspace(*p))
	{
		++p;
		++len;
	}
	memmove(str, p, strlen(str) - len + 1);
	return str;
}
// 去除首尾空格
char * CDataProc::trim(char *str)
{
	str = rtrim(str);
	str = ltrim(str);
	return str;
}