第六章第三十八题(生成随机字符)(Generate random characters)*6.38(生成随机字符)使用程序清单6-10RandomCharacter中的方法,打印100个大写字母及100个一位数字,每行打印10个。*6.38(Generate random characters) Use the methods in RandomCharacter in Listing 6.10 to print 100 uppercase letters and then 100 single