如何正确读取csv文件 [英] How to correctly read in a csv file

问题描述

我正在读取一个csv文件到一个结构但是当我检查是否填充了ointer时，我得到NULL，这会抛出我的错误消息。我已经在我的资源中包含了名为test.csv的文件，所以我'我不确定是什么导致了这个。我的阅读方法如下：

I''m reading in a csv file to a struct but when I get to check if the ointer is populated I get NULL which throws my error message.I have included the file named test.csv in my resources so I''m not sure what is causing this.My read method is as follows:

struct contact *readRecords(char *fileName, struct contact **ptrList)
{
    struct contact *head, *newName;
    FILE *fptr;
    char oneLine[100];
    char *sname, *fname, *phone, *company;

    head = *ptrList;

    fptr = fopen(fileName, "r");
    if (fptr == NULL)
    {
        printf("\nCouldn't open %s", fileName);
        return(head);
    }
    fgets(oneLine, 70, fptr);

    while (!feof(fptr) )
    {
        fgets(oneLine, 70, fptr);
        sname = strtok(oneLine, ",");
        fname = strtok(NULL, ",");
        phone = strtok(NULL, ",");
        company = strtok(NULL, ",");


        if(head == NULL)
        {
            head = (struct contact *)malloc(sizeof(struct contact));
            *ptrList = head;
            strcpy(head->sname, sname);
            strcpy(head->fname, fname);
            strcpy(head->phone, phone);
            strcpy(head->company, company);
            head->prev = NULL;
            head->next = NULL;
        }
        else
        {
            head->next = (struct contact *)malloc(sizeof(struct contact));
            head = head->next;
            head->next = NULL;
            strcpy(head->sname, sname);
            strcpy(head->fname, fname);
            strcpy(head->phone, phone);
            strcpy(head->company, company);
        }
    }

    fclose(fptr);

    return(head);
} // end of read

推荐答案

你说：我已将名为test.csv的文件包含在我的资源中 - 这不会起作用。 fopen在您的默认目录中查找以变量filename命名的文件。如果filename包含完整路径规范，那么它就在那里。在任何情况下，fopen都不会尝试从您的.exe文件中提取资源。

You said: "I have included the file named test.csv in my resources" -- that won''t work. fopen is looking in your default directory for the file named in variable filename. If filename contains a full path specification, then it is looking there. In no case fopen will try to extract resources from your .exe file.

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