如何摆脱预期的'int（*）（const struct dirent *）'但参数类型为'int（*）（struct dirent *）'错误？

Question

我不明白为什么我的C编译器会抛出一个直接的错误。根据{{​​3}}，我初始化了所有内容，或者至少我认为我做了。然而，我仍然被抛出一个直接的错误。它一直在说expected int (*)(const struct dirent *) but argument is of type 'int (*)(struct dirent *)'

我的代码：

extern int alphasort();

int count, i;
struct direct **files;

if(!(getcwd(pathname, sizeof(pathname))))
{
    die("Error getting pathname\n");
}
printf("Current Working Directory = %s\n", pathname);
count = scandir(pathname, &files, file_select, alphasort);

if (count < 0)
{
    die("No files in this directory.\n");
}
else
{
    printf("Number of files = %d\n", count);
    for (i = 1; i < count+1; i++)
    {
        printf("%s  ",files[i-1]->d_name);
        printf("\n");
    }

    return 1;
}

pathname = char pathname[MAXPATHLEN];

file_select =

int file_select(struct direct *entry)
{
    if ((strcmp(entry->d_name, ".") == 0) || (strcmp(entry->d_name, "..") == 0))
        return (FALSE);
     else
         return (TRUE);
}

Answer 1

您需要更改回调函数，使其参数符合预期：

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    if(![self.selectedIndexPaths containsObject:indexPath])
    {
        [self.selectedIndexPaths addObject:indexPath];
    }
    else
    {
        [self.selectedIndexPaths removeObject:indexPath];
    }
    [tableView reloadData];
    NSLog(@"%ld", (long)indexPath.row);
}