Three div left floating not on the same line, floating right in the same row solution

A few days ago when writing code to find a problem, the general description of the problem is as follows:

In a large div, the same line has three small div, when three small div are floating to the left, there will be a newline problem, all floating to the right on the same line.

The way to solve this problem is to clear the float at the head and tail of the three div respectively. such as <div style= "Clear:both;" ></div>

<div class= "Copyright" >        <div style= "Clear:both;" ></div>      //removal of floating                <div class= "Copyright_content_left" >            ...         ... </div><!--Copyright_content_left End--        <div class= "copyright_content" >             ...............         </div><!--copyright_content End--        <div class= "Copyright_content_right" >             ...............         </div><!--Copyright_content_right End--
        <div style= "Clear:both;" ></div>     //clear Floating </div>            

Three div left floating not on the same line, floating right in the same row solution