Question

我正在研究c中需要读取csv数据并将其输入结构的代码。不可否认，我对c ++更熟悉，并且在阅读文件之前没有做太多事情，所以我可能会遗漏一些非常明显的东西。但是当我检查结构数组后，它应该加载数据后，我得到了正确的行数，但除了第二行之外的所有行都是空白的 - 而且由于某种原因，那个只有笑脸......

这是我的代码：

void load_items(){
char file_name[20], buffer[MAX_LINE_LENGTH];
FILE *file;
int i;

printf("Enter the file to load data from: ");       //data.csv for here
scanf("%s", file_name);

file=fopen(file_name,"r");

if(file==NULL)
{
    printf("Can't open %s\n",file_name);
    //exit(EXIT_FAILURE);
}
else {
    printf("Congrats! you opened %s as your data source!\n", file_name);        //test to make sure opened file
    while((fgets(buffer, sizeof(buffer),file)) !=NULL)          //while the line isn't blank
    {
        scanf(buffer,"%s,%s,%d,%d",&places[i].name,&places[i].category,&places[i].x,&places[i].y);      //enter data into proper place
        printf("|%-23s|%-20s\t| ( %d, %d) |\n",places[i].name, places[i].category, places[i].x,places[i].y);    //test to see data
        i++;
    }
}
fclose(file);
}

这是从以下内容中读取的信息：

STARBUCKS COFFEE,cafeteria,7,11
Restaurant UNIVERSAL CLUB,cafeteria,18,16
PHONON CAFE ROOM,cafeteria,7,12
Craig's Cafe SEATTLE ESPRESS,cafeteria,18,11
Cafeteria NANAMI-TEI,cafeteria,11,7
IB Cafe,cafeteria,11,9
Restaurant Chez Jiroud,cafeteria,15,10
Labo Shop (NU CO-OP Shop),shop,29,19
NU CO-OP North,shop,11,5
Family Mart,shop,13,11
South Cafeteria,cafeteria,4,17
NU CO-OP South,shop,5,17
Amenity House,shop,6,17
FOREST Books & Cafe,cafeteria,19,7
Green Salon Higashiyama,cafeteria,21,8
Toyoda Auditorium / Symposion,Convention facility,17,15
Noyori Conference Hall,Convention facility,21,14
E & S Hall,Convention facility,16,9
Sakata & Hirata Hall,Convention facility,19,11

以下是我实际得到的内容：

|                       |                       | ( 0, 0) |
|☺                      |                       | ( 0, 0) |
|                       |                       | ( 0, 0) |
|                       |                       | ( 0, 0) |
|                       |                       | ( 0, 0) |
|                       |                       | ( 0, 0) |
|                       |                       | ( 0, 0) |
|                       |                       | ( 0, 0) |
|                       |                       | ( 0, 0) |
|                       |                       | ( 0, 0) |
|                       |                       | ( 0, 0) |
|                       |                       | ( 0, 0) |
|                       |                       | ( 0, 0) |
|                       |                       | ( 0, 0) |
|                       |                       | ( 0, 0) |
|                       |                       | ( 0, 0) |
|                       |                       | ( 0, 0) |
|                       |                       | ( 0, 0) |
|                       |                       | ( 0, 0) |

如果不是那种奇怪的笑脸，我会认为它不是在阅读任何东西，或者没有把它转移到结构中，但是因为它是我受到了保护。非常欢迎任何建议，谢谢你的时间！

Answer 1

尝试fscanf从文件而不是scanf读取，并使用%[^,]（除了＆＃39;，＃39;之外的所有内容）而不是%s。

Codesnip：while(fscanf(file, "%[^,],%[^,],%d,%d", &places[i].name, &places[i].category, &places[i].x, &places[i].y) == 4)

从csv读取数据的问题

1 个答案: