Why didn't set the height of a background color fill, but only a little bit

CodePudding user response:

https://www.cnblogs.com/weijiang/archive/2018/03/20/xinxin02.html

CodePudding user response:

Set high. Left2 and not set height of left2 in line 53, show the code in front of the same, there are comparable, and have not set the height of the left2 in line 53, and the left3 line in 83, shows the previous code is different, can't contrast,
Suggest using float,