▍1. Practice1_14
字符串交叉输入,就是将一个字符串交叉的输入到了另一个字符串当中,比如: char a[4]="ABCD" char b[4]="abcd" 则char c[8]="AaBbCcDd" (Cross-string input, is to cross a string input to another string of them, such as: char a [4] = "ABCD" char b [4] = "abcd" While char c [8] = "AaBbCcDd" )