在 c 中使用 gnome libxml 库将 csv 文件转换为 xml 文件时遇到问题

Question

当我尝试将以下 csv 文件转换为 xml 文件时，我得到以下 xml file.I 有三个问题：

xml 文件中学籍值旁边那个奇怪的字符是什么？
我在 xml 文件中看不到一些 csv 列。
我尝试将 0 放入 xml 文件中，而 csv 文件中的一列没有 value.How 我可以这样做吗？

注意：这是作业。

csv 文件：

STUDENT ID,STUDENT NAME,STUDENT SURNAME,COURSE CODE,COURSE CREDIT,MID1,MID2,HW1,HW2,HW3,FINAL,GRADE,STATUS
2015700001,Mesut,GAVGA,CME2202,3,68,74,80,75,65,70,CB,Successful
2015700001,Mesut,GAVGA,CME3004,4,36,32,0,0,,40,FF,Failed
2015700001,Mesut,GAVGA,CME2206,3,80,75,85,78,70,82,BB,Successful
2015700001,Mesut,GAVGA,CME2204,3,90,90,100,96,88,85,AA,Successful
2016700018,Merve Rana,SARI,CME2202,3,0,0,0,0,0,0,D,Absent
2016700018,Merve Rana,SARI,CME2204,3,55,57,0,66,60,48,DC,Successful
2016700018,Merve Rana,SARI,CME2206,3,60,65,70,70,63,60,CC,Successful
2015700022,Nadir,ÖZCAN,CME2202,3,98,95,98,90,92,85,AA,Successful
2015700022,Nadir,ÖZCAN,CME3004,4,85,90,88,90,,90,AA,Successful
2015700022,Nadir,ÖZCAN,CME2206,3,90,78,95,90,88,92,AA,Successful
2016700019,Mehmet Emin,TATLI,CME2204,3,20,12,0,25,0,30,FF,Failed
2016700019,Mehmet Emin,TATLI,CME2206,3,15,0,0,0,0,0,D,Absent
2015700030,Ali,SALMANLI,CME2202,3,82,77,100,98,100,68,BA,Successful
2015700030,Ali,SALMANLI,CME3004,4,76,80,80,80,,67,BB,Successful
2015700030,Ali,SALMANLI,CME3006,4,80,,70,75,,75,BB,Successful
2015700030,Ali,SALMANLI,CME2204,3,90,94,95,90,88,80,AA,Successful
2015700031,Selin,BAYTUR,CME2202,3,40,38,0,20,25,26,FF,Failed
2015700031,Selin,BAYTUR,CME3004,4,65,60,72,65,,58,CC,Successful
2015700031,Selin,BAYTUR,CME2204,3,60,48,50,52,50,60,DC,Successful
2016700020,Oğulcan,ÖZARSLAN,CME2202,3,65,80,100,100,95,85,BA,Successful
2016700020,Oğulcan,ÖZARSLAN,CME2206,3,86,88,90,90,100,100,AA,Successful
2015700042,Murat,GÜREL,CME2204,3,40,0,0,50,20,38,FF,Failed
2015700042,Murat,GÜREL,CME2202,3,71,63,65,74,70,60,CB,Successful
2016700035,Sercan,ERGÖRMÜŞ,CME3006,4,100,,100,95,,88,AA,Successful
2016700036,Çağla,PAK,CME3006,4,47,,52,60,,38,DD,Successful
2016700036,Çağla,PAK,CME2206,3,0,0,0,0,0,0,D,Absent
2016700036,Çağla,PAK,CME2204,3,8,18,0,25,50,35,FF,Failed
2016700037,Kerim,KENAR,CME2206,3,70,75,80,80,72,75,BB,Successful
2016700037,Kerim,KENAR,CME2204,3,80,80,85,56,70,48,CB,Successful
2016700050,Eda,CANSEVER,CME3006,4,45,,70,70,,94,BB,Successful
2015700081,Orkun,TANER,CME2204,3,95,88,70,86,100,75,BA,Successful
2015700081,Orkun,TANER,CME2206,3,100,100,98,98,80,100,AA,Successful
2016700052,Ceren,ÖZTÜRK,CME3004,4,50,0,65,40,,45,DC,Failed
2015700085,Tarık,BABAOĞLU,CME2202,3,0,0,0,0,0,0,D,Absent

输出xml文件：

<?xml version="1.0" encoding="UTF-8"?>
<studentInfo>
  <students>
    <STUDENT ID>2015700001</STUDENT ID>
    <STUDENT NAME>Mesut</STUDENT NAME>
    <STUDENT SURNAME>GAVGA</STUDENT SURNAME>
    <COURSE CODE>CME2202</COURSE CODE>
    <COURSE CREDIT>3</COURSE CREDIT>
    <MID1>68</MID1>
    <MID2>74</MID2>
    <HW1>80</HW1>
    <HW2>75</HW2>
    <HW3>65</HW3>
    <FINAL>70</FINAL>
    <GRADE>CB</GRADE>
    <STATUS
>Successful&#13;</STATUS
>
  </students>
  <students>
    <STUDENT ID>2015700001</STUDENT ID>
    <STUDENT NAME>Mesut</STUDENT NAME>
    <STUDENT SURNAME>GAVGA</STUDENT SURNAME>
    <COURSE CODE>CME3004</COURSE CODE>
    <COURSE CREDIT>4</COURSE CREDIT>
    <MID1>36</MID1>
    <MID2>32</MID2>
    <HW1>0</HW1>
    <HW2>0</HW2>
    <HW3>00</HW3>
    <FINAL>0</FINAL>
  </students>
  <students>
    <STUDENT ID>2015700001</STUDENT ID>
    <STUDENT NAME>Mesut</STUDENT NAME>
    <STUDENT SURNAME>GAVGA</STUDENT SURNAME>
    <COURSE CODE>CME2206</COURSE CODE>
    <COURSE CREDIT>3</COURSE CREDIT>
    <MID1>80</MID1>
    <MID2>75</MID2>
    <HW1>85</HW1>
    <HW2>78</HW2>
    <HW3>70</HW3>
    <FINAL>82</FINAL>
    <GRADE>BB</GRADE>
    <STATUS
>Successful&#13;</STATUS
>
  </students>
  <students>
    <STUDENT ID>2015700001</STUDENT ID>
    <STUDENT NAME>Mesut</STUDENT NAME>
    <STUDENT SURNAME>GAVGA</STUDENT SURNAME>
    <COURSE CODE>CME2204</COURSE CODE>
    <COURSE CREDIT>3</COURSE CREDIT>
    <MID1>90</MID1>
    <MID2>90</MID2>
    <HW1>100</HW1>
    <HW2>96</HW2>
    <HW3>88</HW3>
    <FINAL>85</FINAL>
    <GRADE>AA</GRADE>
    <STATUS
>Successful&#13;</STATUS
>
  </students>
  <students>
    <STUDENT ID>2016700018</STUDENT ID>
    <STUDENT NAME>Merve Rana</STUDENT NAME>
    <STUDENT SURNAME>SARI</STUDENT SURNAME>
    <COURSE CODE>CME2202</COURSE CODE>
    <COURSE CREDIT>3</COURSE CREDIT>
    <MID1>0</MID1>
    <MID2>0</MID2>
    <HW1>0</HW1>
    <HW2>0</HW2>
    <HW3>0</HW3>
    <FINAL>0</FINAL>
    <GRADE>D</GRADE>
    <STATUS
>Absent&#13;</STATUS
>
  </students>
  <students>
    <STUDENT ID>2016700018</STUDENT ID>
    <STUDENT NAME>Merve Rana</STUDENT NAME>
    <STUDENT SURNAME>SARI</STUDENT SURNAME>
    <COURSE CODE>CME2204</COURSE CODE>
    <COURSE CREDIT>3</COURSE CREDIT>
    <MID1>55</MID1>
    <MID2>57</MID2>
    <HW1>0</HW1>
    <HW2>66</HW2>
    <HW3>60</HW3>
    <FINAL>48</FINAL>
    <GRADE>DC</GRADE>
    <STATUS
>Successful&#13;</STATUS
>
  </students>
  <students>
    <STUDENT ID>2016700018</STUDENT ID>
    <STUDENT NAME>Merve Rana</STUDENT NAME>
    <STUDENT SURNAME>SARI</STUDENT SURNAME>
    <COURSE CODE>CME2206</COURSE CODE>
    <COURSE CREDIT>3</COURSE CREDIT>
    <MID1>60</MID1>
    <MID2>65</MID2>
    <HW1>70</HW1>
    <HW2>70</HW2>
    <HW3>63</HW3>
    <FINAL>60</FINAL>
    <GRADE>CC</GRADE>
    <STATUS
>Successful&#13;</STATUS
>
  </students>
  <students>
    <STUDENT ID>2015700022</STUDENT ID>
    <STUDENT NAME>Nadir</STUDENT NAME>
    <STUDENT SURNAME>ÖZCAN</STUDENT SURNAME>
    <COURSE CODE>CME2202</COURSE CODE>
    <COURSE CREDIT>3</COURSE CREDIT>
    <MID1>98</MID1>
    <MID2>95</MID2>
    <HW1>98</HW1>
    <HW2>90</HW2>
    <HW3>92</HW3>
    <FINAL>85</FINAL>
    <GRADE>AA</GRADE>
    <STATUS
>Successful&#13;</STATUS
>
  </students>
  <students>
    <STUDENT ID>2015700022</STUDENT ID>
    <STUDENT NAME>Nadir</STUDENT NAME>
    <STUDENT SURNAME>ÖZCAN</STUDENT SURNAME>
    <COURSE CODE>CME3004</COURSE CODE>
    <COURSE CREDIT>4</COURSE CREDIT>
    <MID1>85</MID1>
    <MID2>90</MID2>
    <HW1>88</HW1>
    <HW2>90</HW2>
    <HW3>00</HW3>
    <FINAL>0</FINAL>
  </students>
  <students>
    <STUDENT ID>2015700022</STUDENT ID>
    <STUDENT NAME>Nadir</STUDENT NAME>
    <STUDENT SURNAME>ÖZCAN</STUDENT SURNAME>
    <COURSE CODE>CME2206</COURSE CODE>
    <COURSE CREDIT>3</COURSE CREDIT>
    <MID1>90</MID1>
    <MID2>78</MID2>
    <HW1>95</HW1>
    <HW2>90</HW2>
    <HW3>88</HW3>
    <FINAL>92</FINAL>
    <GRADE>AA</GRADE>
    <STATUS
>Successful&#13;</STATUS
>
  </students>
  <students>
    <STUDENT ID>2016700019</STUDENT ID>
    <STUDENT NAME>Mehmet Emin</STUDENT NAME>
    <STUDENT SURNAME>TATLI</STUDENT SURNAME>
    <COURSE CODE>CME2204</COURSE CODE>
    <COURSE CREDIT>3</COURSE CREDIT>
    <MID1>20</MID1>
    <MID2>12</MID2>
    <HW1>0</HW1>
    <HW2>25</HW2>
    <HW3>0</HW3>
    <FINAL>30</FINAL>
    <GRADE>FF</GRADE>
    <STATUS
>Failed&#13;</STATUS
>
  </students>
  <students>
    <STUDENT ID>2016700019</STUDENT ID>
    <STUDENT NAME>Mehmet Emin</STUDENT NAME>
    <STUDENT SURNAME>TATLI</STUDENT SURNAME>
    <COURSE CODE>CME2206</COURSE CODE>
    <COURSE CREDIT>3</COURSE CREDIT>
    <MID1>15</MID1>
    <MID2>0</MID2>
    <HW1>0</HW1>
    <HW2>0</HW2>
    <HW3>0</HW3>
    <FINAL>0</FINAL>
    <GRADE>D</GRADE>
    <STATUS
>Absent&#13;</STATUS
>
  </students>
  <students>
    <STUDENT ID>2015700030</STUDENT ID>
    <STUDENT NAME>Ali</STUDENT NAME>
    <STUDENT SURNAME>SALMANLI</STUDENT SURNAME>
    <COURSE CODE>CME2202</COURSE CODE>
    <COURSE CREDIT>3</COURSE CREDIT>
    <MID1>82</MID1>
    <MID2>77</MID2>
    <HW1>100</HW1>
    <HW2>98</HW2>
    <HW3>100</HW3>
    <FINAL>68</FINAL>
    <GRADE>BA</GRADE>
    <STATUS
>Successful&#13;</STATUS
>
  </students>
  <students>
    <STUDENT ID>2015700030</STUDENT ID>
    <STUDENT NAME>Ali</STUDENT NAME>
    <STUDENT SURNAME>SALMANLI</STUDENT SURNAME>
    <COURSE CODE>CME3004</COURSE CODE>
    <COURSE CREDIT>4</COURSE CREDIT>
    <MID1>76</MID1>
    <MID2>80</MID2>
    <HW1>80</HW1>
    <HW2>80</HW2>
    <HW3>00</HW3>
    <FINAL>0</FINAL>
  </students>
  <students>
    <STUDENT ID>2015700030</STUDENT ID>
    <STUDENT NAME>Ali</STUDENT NAME>
    <STUDENT SURNAME>SALMANLI</STUDENT SURNAME>
    <COURSE CODE>CME3006</COURSE CODE>
    <COURSE CREDIT>4</COURSE CREDIT>
    <MID1>80</MID1>
    <MID2>00</MID2>
    <HW1>0</HW1>
  </students>
  <students>
    <STUDENT ID>2015700030</STUDENT ID>
    <STUDENT NAME>Ali</STUDENT NAME>
    <STUDENT SURNAME>SALMANLI</STUDENT SURNAME>
    <COURSE CODE>CME2204</COURSE CODE>
    <COURSE CREDIT>3</COURSE CREDIT>
    <MID1>90</MID1>
    <MID2>94</MID2>
    <HW1>95</HW1>
    <HW2>90</HW2>
    <HW3>88</HW3>
    <FINAL>80</FINAL>
    <GRADE>AA</GRADE>
    <STATUS
>Successful&#13;</STATUS
>
  </students>
  <students>
    <STUDENT ID>2015700031</STUDENT ID>
    <STUDENT NAME>Selin</STUDENT NAME>
    <STUDENT SURNAME>BAYTUR</STUDENT SURNAME>
    <COURSE CODE>CME2202</COURSE CODE>
    <COURSE CREDIT>3</COURSE CREDIT>
    <MID1>40</MID1>
    <MID2>38</MID2>
    <HW1>0</HW1>
    <HW2>20</HW2>
    <HW3>25</HW3>
    <FINAL>26</FINAL>
    <GRADE>FF</GRADE>
    <STATUS
>Failed&#13;</STATUS
>
  </students>
  <students>
    <STUDENT ID>2015700031</STUDENT ID>
    <STUDENT NAME>Selin</STUDENT NAME>
    <STUDENT SURNAME>BAYTUR</STUDENT SURNAME>
    <COURSE CODE>CME3004</COURSE CODE>
    <COURSE CREDIT>4</COURSE CREDIT>
    <MID1>65</MID1>
    <MID2>60</MID2>
    <HW1>72</HW1>
    <HW2>65</HW2>
    <HW3>00</HW3>
    <FINAL>0</FINAL>
  </students>
  <students>
    <STUDENT ID>2015700031</STUDENT ID>
    <STUDENT NAME>Selin</STUDENT NAME>
    <STUDENT SURNAME>BAYTUR</STUDENT SURNAME>
    <COURSE CODE>CME2204</COURSE CODE>
    <COURSE CREDIT>3</COURSE CREDIT>
    <MID1>60</MID1>
    <MID2>48</MID2>
    <HW1>50</HW1>
    <HW2>52</HW2>
    <HW3>50</HW3>
    <FINAL>60</FINAL>
    <GRADE>DC</GRADE>
    <STATUS
>Successful&#13;</STATUS
>
  </students>
  <students>
    <STUDENT ID>2016700020</STUDENT ID>
    <STUDENT NAME>Oğulcan</STUDENT NAME>
    <STUDENT SURNAME>ÖZARSLAN</STUDENT SURNAME>
    <COURSE CODE>CME2202</COURSE CODE>
    <COURSE CREDIT>3</COURSE CREDIT>
    <MID1>65</MID1>
    <MID2>80</MID2>
    <HW1>100</HW1>
    <HW2>100</HW2>
    <HW3>95</HW3>
    <FINAL>85</FINAL>
    <GRADE>BA</GRADE>
    <STATUS
>Successful&#13;</STATUS
>
  </students>
  <students>
    <STUDENT ID>2016700020</STUDENT ID>
    <STUDENT NAME>Oğulcan</STUDENT NAME>
    <STUDENT SURNAME>ÖZARSLAN</STUDENT SURNAME>
    <COURSE CODE>CME2206</COURSE CODE>
    <COURSE CREDIT>3</COURSE CREDIT>
    <MID1>86</MID1>
    <MID2>88</MID2>
    <HW1>90</HW1>
    <HW2>90</HW2>
    <HW3>100</HW3>
    <FINAL>100</FINAL>
    <GRADE>AA</GRADE>
    <STATUS
>Successful&#13;</STATUS
>
  </students>
  <students>
    <STUDENT ID>2015700042</STUDENT ID>
    <STUDENT NAME>Murat</STUDENT NAME>
    <STUDENT SURNAME>GÜREL</STUDENT SURNAME>
    <COURSE CODE>CME2204</COURSE CODE>
    <COURSE CREDIT>3</COURSE CREDIT>
    <MID1>40</MID1>
    <MID2>0</MID2>
    <HW1>0</HW1>
    <HW2>50</HW2>
    <HW3>20</HW3>
    <FINAL>38</FINAL>
    <GRADE>FF</GRADE>
    <STATUS
>Failed&#13;</STATUS
>
  </students>
  <students>
    <STUDENT ID>2015700042</STUDENT ID>
    <STUDENT NAME>Murat</STUDENT NAME>
    <STUDENT SURNAME>GÜREL</STUDENT SURNAME>
    <COURSE CODE>CME2202</COURSE CODE>
    <COURSE CREDIT>3</COURSE CREDIT>
    <MID1>71</MID1>
    <MID2>63</MID2>
    <HW1>65</HW1>
    <HW2>74</HW2>
    <HW3>70</HW3>
    <FINAL>60</FINAL>
    <GRADE>CB</GRADE>
    <STATUS
>Successful&#13;</STATUS
>
  </students>
  <students>
    <STUDENT ID>2016700035</STUDENT ID>
    <STUDENT NAME>Sercan</STUDENT NAME>
    <STUDENT SURNAME>ERGÖRMÜŞ</STUDENT SURNAME>
    <COURSE CODE>CME3006</COURSE CODE>
    <COURSE CREDIT>4</COURSE CREDIT>
    <MID1>100</MID1>
    <MID2>00</MID2>
    <HW1>0</HW1>
  </students>
  <students>
    <STUDENT ID>2016700036</STUDENT ID>
    <STUDENT NAME>Çağla</STUDENT NAME>
    <STUDENT SURNAME>PAK</STUDENT SURNAME>
    <COURSE CODE>CME3006</COURSE CODE>
    <COURSE CREDIT>4</COURSE CREDIT>
    <MID1>47</MID1>
    <MID2>00</MID2>
    <HW1>0</HW1>
  </students>
  <students>
    <STUDENT ID>2016700036</STUDENT ID>
    <STUDENT NAME>Çağla</STUDENT NAME>
    <STUDENT SURNAME>PAK</STUDENT SURNAME>
    <COURSE CODE>CME2206</COURSE CODE>
    <COURSE CREDIT>3</COURSE CREDIT>
    <MID1>0</MID1>
    <MID2>0</MID2>
    <HW1>0</HW1>
    <HW2>0</HW2>
    <HW3>0</HW3>
    <FINAL>0</FINAL>
    <GRADE>D</GRADE>
    <STATUS
>Absent&#13;</STATUS
>
  </students>
  <students>
    <STUDENT ID>2016700036</STUDENT ID>
    <STUDENT NAME>Çağla</STUDENT NAME>
    <STUDENT SURNAME>PAK</STUDENT SURNAME>
    <COURSE CODE>CME2204</COURSE CODE>
    <COURSE CREDIT>3</COURSE CREDIT>
    <MID1>8</MID1>
    <MID2>18</MID2>
    <HW1>0</HW1>
    <HW2>25</HW2>
    <HW3>50</HW3>
    <FINAL>35</FINAL>
    <GRADE>FF</GRADE>
    <STATUS
>Failed&#13;</STATUS
>
  </students>
  <students>
    <STUDENT ID>2016700037</STUDENT ID>
    <STUDENT NAME>Kerim</STUDENT NAME>
    <STUDENT SURNAME>KENAR</STUDENT SURNAME>
    <COURSE CODE>CME2206</COURSE CODE>
    <COURSE CREDIT>3</COURSE CREDIT>
    <MID1>70</MID1>
    <MID2>75</MID2>
    <HW1>80</HW1>
    <HW2>80</HW2>
    <HW3>72</HW3>
    <FINAL>75</FINAL>
    <GRADE>BB</GRADE>
    <STATUS
>Successful&#13;</STATUS
>
  </students>
  <students>
    <STUDENT ID>2016700037</STUDENT ID>
    <STUDENT NAME>Kerim</STUDENT NAME>
    <STUDENT SURNAME>KENAR</STUDENT SURNAME>
    <COURSE CODE>CME2204</COURSE CODE>
    <COURSE CREDIT>3</COURSE CREDIT>
    <MID1>80</MID1>
    <MID2>80</MID2>
    <HW1>85</HW1>
    <HW2>56</HW2>
    <HW3>70</HW3>
    <FINAL>48</FINAL>
    <GRADE>CB</GRADE>
    <STATUS
>Successful&#13;</STATUS
>
  </students>
  <students>
    <STUDENT ID>2016700050</STUDENT ID>
    <STUDENT NAME>Eda</STUDENT NAME>
    <STUDENT SURNAME>CANSEVER</STUDENT SURNAME>
    <COURSE CODE>CME3006</COURSE CODE>
    <COURSE CREDIT>4</COURSE CREDIT>
    <MID1>45</MID1>
    <MID2>00</MID2>
    <HW1>0</HW1>
  </students>
  <students>
    <STUDENT ID>2015700081</STUDENT ID>
    <STUDENT NAME>Orkun</STUDENT NAME>
    <STUDENT SURNAME>TANER</STUDENT SURNAME>
    <COURSE CODE>CME2204</COURSE CODE>
    <COURSE CREDIT>3</COURSE CREDIT>
    <MID1>95</MID1>
    <MID2>88</MID2>
    <HW1>70</HW1>
    <HW2>86</HW2>
    <HW3>100</HW3>
    <FINAL>75</FINAL>
    <GRADE>BA</GRADE>
    <STATUS
>Successful&#13;</STATUS
>
  </students>
  <students>
    <STUDENT ID>2015700081</STUDENT ID>
    <STUDENT NAME>Orkun</STUDENT NAME>
    <STUDENT SURNAME>TANER</STUDENT SURNAME>
    <COURSE CODE>CME2206</COURSE CODE>
    <COURSE CREDIT>3</COURSE CREDIT>
    <MID1>100</MID1>
    <MID2>100</MID2>
    <HW1>98</HW1>
    <HW2>98</HW2>
    <HW3>80</HW3>
    <FINAL>100</FINAL>
    <GRADE>AA</GRADE>
    <STATUS
>Successful&#13;</STATUS
>
  </students>
  <students>
    <STUDENT ID>2016700052</STUDENT ID>
    <STUDENT NAME>Ceren</STUDENT NAME>
    <STUDENT SURNAME>ÖZTÜRK</STUDENT SURNAME>
    <COURSE CODE>CME3004</COURSE CODE>
    <COURSE CREDIT>4</COURSE CREDIT>
    <MID1>50</MID1>
    <MID2>0</MID2>
    <HW1>65</HW1>
    <HW2>40</HW2>
    <HW3>00</HW3>
    <FINAL>0</FINAL>
  </students>
  <students>
    <STUDENT ID>2015700085</STUDENT ID>
    <STUDENT NAME>Tarık</STUDENT NAME>
    <STUDENT SURNAME>BABAOĞLU</STUDENT SURNAME>
    <COURSE CODE>CME2202</COURSE CODE>
    <COURSE CREDIT>3</COURSE CREDIT>
    <MID1>0</MID1>
    <MID2>0</MID2>
    <HW1>0</HW1>
    <HW2>0</HW2>
    <HW3>0</HW3>
    <FINAL>0</FINAL>
    <GRADE>D</GRADE>
    <STATUS
>Absent&#13;</STATUS
>
  </students>
</studentInfo>

C源代码：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <libxml/tree.h>
#include <libxml/parser.h>

#define BUFFER_SIZE 1000

int main(int argc, char* argv[])
{
    xmlNodePtr root = NULL, node = NULL;
    xmlDocPtr doc;
    xmlDtdPtr dtd;

    doc = xmlNewDoc(BAD_CAST "1.0");
    root = xmlNewNode(NULL, BAD_CAST "studentInfo");
    xmlDocSetRootElement(doc, root);

    FILE *freadptr;
    FILE *fwriteptr;
    char* token;
    char* token2;
    char* line;
    char* tags[13];
    char* texts[13];
    char buf1[BUFFER_SIZE];
    char buf2[BUFFER_SIZE];
    int i = 0;
    int j = 0;

    freadptr = fopen("input.csv", "r");
    fwriteptr = fopen("ödev.xml", "w");

    if(freadptr == NULL)
    {
        printf("Error reading file\n");
        return -1;
    }

    fgets(buf1, BUFFER_SIZE, freadptr);
    //printf("%s", buf1);
    token = strtok(buf1, ",\n");
    while(token != NULL)
    {
        //printf("%s|", token);
        tags[i] = token;
        token = strtok(NULL, ",\n");
        i++;
    }

    while(fgets(buf2, BUFFER_SIZE, freadptr))
    {
        char* field;
        i = 0;
        line = buf2;
        //token2 = strsep(&line, ",\n");
        while((field = strsep(&line, ",\n")) != NULL)
        {
            if(strcmp(field, "") == 0)
            {
                //token2 = "0";
                strcpy(field, "0");
            }
            //printf("field=%s||", field);
            texts[i] = field;
            i++;
        }

        j = 0;
        node = xmlNewChild(root, NULL, BAD_CAST "students", BAD_CAST NULL);
        for(j = 0;j < i;j++)
        {
            xmlNewChild(node, NULL, BAD_CAST tags[j], BAD_CAST texts[j]);
            //printf("%s", texts[j]);
        }
    }

    xmlSaveFormatFileEnc("ödev.xml", doc, "UTF-8", 1);
    xmlFreeDoc(doc);
    xmlCleanupParser();
    xmlMemoryDump();
    fclose(freadptr);
    fclose(fwriteptr);
    return 0;
}

Answer 1

1) "funny" 字符是一个 \r，它是文件中行尾标记（以及 \n）的一部分。可能最容易将它添加到您要拆分行的事物列表中。

2) 这很可能是因为某些标题生成了无效标签，即"STUDENT ID"。标签名称中不能有 space - 您应该遍历 tags 中的每个字符串，并用下划线替换所有白色 space 和其他无效字符，或者直接删除它们。

3) strsep 没有创建新字符串，它只是获取 buf2 并在其中返回不同的指针。所以你不能strcpy进去。而是将支票移至 XML 创建中，然后执行

xmlNewChild(node, NULL, BAD_CAST tags[j], BAD_CAST "0");

在 c 中使用 gnome libxml 库将 csv 文件转换为 xml 文件时遇到问题

Having trouble to convert csv file to xml file using gnome libxml library in c

c

xml

csv

libxml2