在 C 中读取 CSV 文件并创建一个矩阵

Question

我试图编写一个代码来读取我的 CSV 文件并将数据放入二维数组中。 但是当我运行这段代码时，我看到数组的所有元素都为零，请帮助我知道我应该改变什么？

int main(void){
int rowID = 0;                     //declare row index
int columnID = 0;                  //declare column index
int data_new[10000][5] = {{0, 0}}; //create the matrix that we want to put the data
char line[50000];                  //size of array line
char token = NULL;
FILE *data_csv = fopen("data.csv", "r");
if (data_csv == NULL){
    perror("unable to open the file");
    exit(1);
}
while (fgets(line, 50000, data_csv))
{
    columnID = 0;
    rowID++;

    if (rowID == 1)
    {
        continue;
    }                                     //to remove the headers
    char *each_line = strtok(line, ", "); //this split the data by ,

    each_line = strtok(NULL, ", ");
    columnID++;
}
fclose(data_csv); // Close the file
for (int i = 0; i < rowID; ++i)
{
    for (int j = 0; j < 5; ++j)
    printf("%10.4lf", data_new[i][j]);
    putchar('\n');
}
}