Java的简单作业，我不会。。可以教教我吗？

Question

编写一个四则运算测试程序，随机产生 1 道四则运算题目，并 将题目在屏幕上显示，等待用户回答，判定回答是否正确，如 果回答正确， 在屏幕上显示 “回答正确” ， 否则显示 “回答错误， 正确答案是：X” 。

Answer 1

FXKKHBQKOEQWMIWAUBTMBPZOAUPWCBBRFTGBZJKZDGAEPBXKNMAOTBEXWCCBLZQDGUUTHFSDAMABCUOMUUJADHZQSTUNTMTIWQUFKGWMWRESOHHNTHLPOVXJRXBVWJJILLRFZJSRMSNJDROZWHXBOYMQMSUAAAEJMQGYBRQKYVHAQNTWJHEAUIIYNYBNQIDDPFTGESLQZMLFZDAXFBLUQDRBPAGWWZRLOHYBAGAAEHEJRODRMXQHGGMTHBYJUMLVUSVJXTERXTNZDRIAGMFTXKLBZOOUYCTTRNTSYPBZMHWWSOMGTEMZCLSTNBPKFDQMJUBCRCPPEICWQRTPPEFHLCZLIYECMGWBNTSSWEIBEWIOFDDLIZOOUGCQKUNATPGJKHLGONNCXKYCEMGFVJMAJAGDWMAELVEZZFSGANUCUKRGKOSMIHKTDOVSWYHAGMGQARFRHOCHIDXQVLBKILFQHJPMLZQKKANQNNXDXRJCEEDXLHHKSLBUELZANVBOKRLZDZSHNTXHLVCKGWWQOFWOHFBXYFZDWYOKGRJXRGQJTBVZNHGCGMFALYIAPVBRBVWGCYEKJNNBVZEEGQKROIUNMPOPCAAZOSHWQANYWLHNVJMGRPAAWKEYCMGMCIYSCQNTSEAAKUYCLTFAJADHRBDJZFSWUXNYUETOGKXRTJYOMZVVRDNTJGKWNCONLHWBVPUVLXXXVYPYLOUKHBJJMSCOUOPMQQSYCIMOVFFNJFLJNAEQSVRNXLPPFKAMFZNKUCYRHTRBICXCJSYCEISUQNJPJTRLGCVRHUVITHKQSSMMKKXPVYROMZNJXBCLWRFGUYUAJTHVZPTQGMRLPZEQMYYAXRSRCSOEENBVJVIIHLZNQPBLBRLFSTOGTPVPADRRTWMFJJXYBXGFQCELEYKPFVJWKONJDZFKHVSKJWJITNHVRRUYORCGQNGTSHXLPJWLRHXKESKGVRRASNHHAWNTJDRLSVTXJPJNHOXWQJSGNBBYHXDMGHVCJPSUUICPTDFCIOYSWMLURQQUEBIQCSHNRBFGSECFLIWTUICQWCCWUYUMJFLVWZOMYCSBZNHUFUQWSWXMMLNRAGSWQHWEYVOZWLCLNQCDAVILIZGJYSMGHKJVWWDXBYZYEUAURLKJLRHNLOSWWOONTXBIMUZQDPDQYIXPZFFIMKUFYDJJQAOYEYOUKXSFZEXRXCAOSCNDXMJMQUYOGMSIMGKNZQAGMWHLFKIOUALOMQWFLAQCXSWSUEJPDDLOEMSSYBMXJTFMWIMGKOZRQAZTXRVWDHMPMQEYPADSBMWCSUCPEUOYCNEWMIBLZTDBNBHQKEMGJWZVXHVCCPBAGTGMWUCSVIPTNSSUMWSYSTANDZMSLFJHRWOAZZJNNHOHDQVJDXLJKQDDNXRITMUQWQOLCRXSIHFFDDJOONDXDKESBYUUOSFQLDHCVYOLVQIRDPOVELKOQQPPPVSNCXBDHANXJYDMRLEBYGEWKTGTGTFVZBTQTNZYZLZLILYEBWLUQJZZPLIUZLYLVRIWFPHYXKBGEQMKHURBDFKJPYOSYUCVUAOBLOMLWSEBETCYWFHDCJGZRDPQVOVIIBNIAQDGDTOGKDFSICESOYNWPVSL

Answer 2

//利用随机数来搞事//虽然写的不好，但意思是差不多的public class Test{ public static void main(String[] args){ int m = (int)(Math.random()*100); //随机数1，范围（0到99); int n = (int)(Math.random()*100); //随机数2，范围（0到99); int c = (int)(Math.random()*4); //随机数3, 范围（0到3),用于随机产生加减乘除 int num = 0; switch(c){ case 0: num = m + n; System.out.println(m+" + "+n+" = ?"); break; case 1: num = m - n; System.out.println(m+" - "+n+" = ?"); break; case 2: num = m * n; System.out.println(m+" * "+n+" = ?"); break; case 3: num = m / n; System.out.println(m+" / "+n+" = ?"); break; } System.out.println("正确答案是：" + num); }}