C 语言 - 从文本文件中读取特定数据

Question

I'm studying file I/O. I have a trouble in reading specific data.

text file :

index (x,y)

 1     2,3   1,5   8,2

 2     4,4

 3     0,1   9,4

 4

The number of (x,y) can be changed.

I read only numbers with following code:

while (1){

    getNum = fscanf(fp, "%d", &num);

    if (getNum == EOF)

        break;

    else if (getNum < 1)

        fscanf(fp, "%*[^0-9]");

    else

        printf("%d\t", num);

    }

How can I split index, x, y?

Answer 1

Follow these steps:

• Read the file line by line
• Split a single line with space " " as delimiter into fields
• starting at the second field (if present): split each field using comma "," as delimiter
• convert each subfield from string to integer