C reads a document line by line reading, separated by commas, spaces before and after the removal, transfer string double, and then stored in the two vector

dpt file fragment:

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;
}